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Dedication of the Flight 93 National Memorial

People gather at the dedication ceremony for phase I of the permanent Flight 93 National Memorial near the crash site of Flight 93 in Shanksville, Pa. Saturday Sept. 10, 2011.

'Tower of Voices' set to open at Flight 93 Memorial
'Tower of Voices' set to open at Flight 93 Memorial
'Tower of Voices' set to open at Flight 93 Memorial
'Tower of Voices' set to open at Flight 93 Memorial
'Tower of Voices' set to open at Flight 93 Memorial
'Tower of Voices' set to open at Flight 93 Memorial
'Tower of Voices' set to open at Flight 93 Memorial
'Tower of Voices' set to open at Flight 93 Memorial
Remaining wreckage of Flight 93 buried at memorial
Remaining wreckage of Flight 93 buried at memorial
Remaining wreckage of Flight 93 buried at memorial
Remaining wreckage of Flight 93 buried at memorial
Remaining wreckage of Flight 93 buried at memorial
Remaining wreckage of Flight 93 buried at memorial
Remaining wreckage of Flight 93 buried at memorial
Remaining wreckage of Flight 93 buried at memorial
FILE – In this May 31, 2018 file photo, visitors to the Flight 93 National Memorial pause at the Wall of Names honoring 40 passengers and crew members of United Flight 93 killed when the hijacked jet crashed at the site during the 9/11 terrorist attacks, near Shanksville, Pa. Four shipping containers holding the remaining wreckage of United Flight 93 were buried near the Wall of Names in a private ceremony on June 21, the Flight 93 National Memorial said Monday, July 9, 2018. The wreckage is buried in a restricted access zone in the woods beyond the Wall of Names marked by a giant boulder, not accessible to the public or media. (AP Photo/Gene J. Puskar, File)
FILE – In this May 31, 2018 file photo, visitors to the Flight 93 National Memorial pause at the Wall of Names honoring 40 passengers and crew members of United Flight 93 killed when the hijacked jet crashed at the site during the 9/11 terrorist attacks, near Shanksville, Pa. Four shipping containers holding the remaining wreckage of United Flight 93 were buried near the Wall of Names in a private ceremony on June 21, the Flight 93 National Memorial said Monday, July 9, 2018. The wreckage is buried in a restricted access zone in the woods beyond the Wall of Names marked by a giant boulder, not accessible to the public or media. (AP Photo/Gene J. Puskar, File)
FILE – In this May 31, 2018 file photo, a visitor to the Flight 93 National Memorial pauses at the Wall of Names honoring 40 passengers and crew members of United Flight 93 killed when the hijacked jet crashed at the site during the 9/11 terrorist attacks, near Shanksville, Pa. Four shipping containers holding the remaining wreckage of United Flight 93 were buried near the Wall of Names in a private ceremony on June 21, 2018, the Flight 93 National Memorial said Monday, July 9, 2018. The wreckage is buried in a restricted access zone in the woods beyond the Wall of Names marked by a giant boulder, not accessible to the public or media. (AP Photo/Gene J. Puskar, File)
FILE – In this May 31, 2018 file photo, a visitor to the Flight 93 National Memorial pauses at the Wall of Names honoring 40 passengers and crew members of United Flight 93 killed when the hijacked jet crashed at the site during the 9/11 terrorist attacks, near Shanksville, Pa. Four shipping containers holding the remaining wreckage of United Flight 93 were buried near the Wall of Names in a private ceremony on June 21, 2018, the Flight 93 National Memorial said Monday, July 9, 2018. The wreckage is buried in a restricted access zone in the woods beyond the Wall of Names marked by a giant boulder, not accessible to the public or media. (AP Photo/Gene J. Puskar, File)
FILE – In this Sept. 11, 2001 file photo, firefighters and emergency workers investigate the crash of United Flight 93 after the jet was hijacked during the 9/11 terrorist attacks, near Shanksville, Pa. Four shipping containers holding the remaining wreckage of United Flight 93 were buried at the Flight 93 National Memorial in a private ceremony on June 21, 2018, memorial officials said Monday, July 9, 2018. The wreckage is buried in a restricted area accessible only to loved ones of the victims, not to the public or media. (David Lloyd/The Tribune-Democrat via AP)
FILE – In this Sept. 11, 2001 file photo, firefighters and emergency workers investigate the crash of United Flight 93 after the jet was hijacked during the 9/11 terrorist attacks, near Shanksville, Pa. Four shipping containers holding the remaining wreckage of United Flight 93 were buried at the Flight 93 National Memorial in a private ceremony on June 21, 2018, memorial officials said Monday, July 9, 2018. The wreckage is buried in a restricted area accessible only to loved ones of the victims, not to the public or media. (David Lloyd/The Tribune-Democrat via AP)
FILE – In this Sept. 16, 2001 file photo, FBI personnel continue excavating the site where United Flight 93 crashed after the jet was hijacked during the 9/11 terrorist attacks, near Shanksville, Pa. Four shipping containers holding the remaining wreckage of United Flight 93 were buried at the Flight 93 National Memorial in a private ceremony on June 21, 2018, memorial officials said Monday, July 9, 2018. The wreckage is buried in a restricted area accessible only to loved ones of the victims, not to the public or media. (AP Photo/Gene J. Puskar, File)
FILE – In this Sept. 16, 2001 file photo, FBI personnel continue excavating the site where United Flight 93 crashed after the jet was hijacked during the 9/11 terrorist attacks, near Shanksville, Pa. Four shipping containers holding the remaining wreckage of United Flight 93 were buried at the Flight 93 National Memorial in a private ceremony on June 21, 2018, memorial officials said Monday, July 9, 2018. The wreckage is buried in a restricted area accessible only to loved ones of the victims, not to the public or media. (AP Photo/Gene J. Puskar, File)
This May 31, 2018, photo shows the first section of the 93-foot tall Tower of Voices wind chimes is in place at the Flight 93 National Memorial in Shanksville, Pa. The final phase of the memorial is underway and on track to open on the 17th anniversary of plane's crash into a Pennsylvania field during 9/11. (AP Photo/Gene J. Puskar)
This May 31, 2018, photo shows the first section of the 93-foot tall Tower of Voices wind chimes is in place at the Flight 93 National Memorial in Shanksville, Pa. The final phase of the memorial is underway and on track to open on the 17th anniversary of plane's crash into a Pennsylvania field during 9/11. (AP Photo/Gene J. Puskar)
This May 31, 2018, photo shows the first section of the 93-foot tall Tower of Voices wind chimes is in place at the Flight 93 National Memorial in Shanksville, Pa. The final phase of the memorial is underway and on track to open on the 17th anniversary of plane's crash into a Pennsylvania field during 9/11. (AP Photo/Gene J. Puskar)
This May 31, 2018, photo shows the first section of the 93-foot tall Tower of Voices wind chimes is in place at the Flight 93 National Memorial in Shanksville, Pa. The final phase of the memorial is underway and on track to open on the 17th anniversary of plane's crash into a Pennsylvania field during 9/11. (AP Photo/Gene J. Puskar)
This May 31, 2018, photo shows the first section of the 93-foot tall Tower of Voices wind chimes is in place at the Flight 93 National Memorial in Shanksville, Pa. The final phase of the memorial is underway and on track to open on the 17th anniversary of plane's crash into a Pennsylvania field during 9/11. (AP Photo/Gene J. Puskar)
This May 31, 2018, photo shows the first section of the 93-foot tall Tower of Voices wind chimes is in place at the Flight 93 National Memorial in Shanksville, Pa. The final phase of the memorial is underway and on track to open on the 17th anniversary of plane's crash into a Pennsylvania field during 9/11. (AP Photo/Gene J. Puskar)
The first section of the 93-foot tall Tower of Voices wind chimes is in place on Thursday, May 31, 2018 at the Flight 93 National Memorial in Shanksville, Pa. With the dedication of the tower containing 40 wind chimes on Sept. 9, 2018, the memorial's original design will be completed. (AP Photo/Gene J. Puskar)
The first section of the 93-foot tall Tower of Voices wind chimes is in place on Thursday, May 31, 2018 at the Flight 93 National Memorial in Shanksville, Pa. With the dedication of the tower containing 40 wind chimes on Sept. 9, 2018, the memorial's original design will be completed. (AP Photo/Gene J. Puskar)
The first section of the 93-foot tall Tower of Voices wind chimes is in place on Thursday, May 31, 2018 at the Flight 93 National Memorial in Shanksville, Pa. With the dedication of the tower containing 40 wind chimes on Sept. 9, 2018, the memorial's original design will be completed. (AP Photo/Gene J. Puskar)
The first section of the 93-foot tall Tower of Voices wind chimes is in place on Thursday, May 31, 2018 at the Flight 93 National Memorial in Shanksville, Pa. With the dedication of the tower containing 40 wind chimes on Sept. 9, 2018, the memorial's original design will be completed. (AP Photo/Gene J. Puskar)
The first section of the 93-foot tall Tower of Voices wind chimes is in place on Thursday, May 31, 2018 at the Flight 93 National Memorial in Shanksville, Pa. With the dedication of the tower containing 40 wind chimes on Sept. 9, 2018, the memorial's original design will be completed. (AP Photo/Gene J. Puskar)
The first section of the 93-foot tall Tower of Voices wind chimes is in place on Thursday, May 31, 2018 at the Flight 93 National Memorial in Shanksville, Pa. With the dedication of the tower containing 40 wind chimes on Sept. 9, 2018, the memorial's original design will be completed. (AP Photo/Gene J. Puskar)
The first section of the 93-foot tall Tower of Voices wind chimes is in place on Thursday, May 31, 2018 at the Flight 93 National Memorial in Shanksville, Pa. With the dedication of the tower containing 40 wind chimes on Sept. 9, 2018, the memorial's original design will be completed. (AP Photo/Gene J. Puskar)
The first section of the 93-foot tall Tower of Voices wind chimes is in place on Thursday, May 31, 2018 at the Flight 93 National Memorial in Shanksville, Pa. With the dedication of the tower containing 40 wind chimes on Sept. 9, 2018, the memorial's original design will be completed. (AP Photo/Gene J. Puskar)
The first section of the 93-foot tall Tower of Voices wind chimes is in place on Thursday, May 31, 2018 at the Flight 93 National Memorial in Shanksville, Pa. With the dedication of the tower containing 40 wind chimes on Sept. 9, 2018, the memorial's original design will be completed. (AP Photo/Gene J. Puskar)
The first section of the 93-foot tall Tower of Voices wind chimes is in place on Thursday, May 31, 2018 at the Flight 93 National Memorial in Shanksville, Pa. With the dedication of the tower containing 40 wind chimes on Sept. 9, 2018, the memorial's original design will be completed. (AP Photo/Gene J. Puskar)
The first section of the 93-foot tall Tower of Voices wind chimes is in place on Thursday, May 31, 2018 at the Flight 93 National Memorial in Shanksville, Pa. With the dedication of the tower containing 40 wind chimes on Sept. 9, 2018, the memorial's original design will be completed. (AP Photo/Gene J. Puskar)
The first section of the 93-foot tall Tower of Voices wind chimes is in place on Thursday, May 31, 2018 at the Flight 93 National Memorial in Shanksville, Pa. With the dedication of the tower containing 40 wind chimes on Sept. 9, 2018, the memorial's original design will be completed. (AP Photo/Gene J. Puskar)
The first section of the 93-foot tall Tower of Voices wind chimes is in place on Thursday, May 31, 2018 at the Flight 93 National Memorial in Shanksville, Pa. With the dedication of the tower containing 40 wind chimes on Sept. 9, 2018, the memorial's original design will be completed. (AP Photo/Gene J. Puskar)
The first section of the 93-foot tall Tower of Voices wind chimes is in place on Thursday, May 31, 2018 at the Flight 93 National Memorial in Shanksville, Pa. With the dedication of the tower containing 40 wind chimes on Sept. 9, 2018, the memorial's original design will be completed. (AP Photo/Gene J. Puskar)
FILE – In this Sept. 16, 2001, file photo, an American flag flies from a makeshift altar overlooking the ongoing investigation of the United Flight 93 crash site in Shanksville, Pa. Officials announced Friday, June 1, 2018, that later in the year, the National Park Service will return the remaining wreckage of United Flight 93 to the Pennsylvania memorial marking where it crashed in the 9/11 terror attacks, and the remaining wreckage will be buried in a restricted area accessible only to loved ones of the victims. (AP Photo/Gene J. Puskar, File)
FILE – In this Sept. 16, 2001, file photo, an American flag flies from a makeshift altar overlooking the ongoing investigation of the United Flight 93 crash site in Shanksville, Pa. Officials announced Friday, June 1, 2018, that later in the year, the National Park Service will return the remaining wreckage of United Flight 93 to the Pennsylvania memorial marking where it crashed in the 9/11 terror attacks, and the remaining wreckage will be buried in a restricted area accessible only to loved ones of the victims. (AP Photo/Gene J. Puskar, File)
FILE – In this Sept. 16, 2001, file photo, FBI investigators continue excavating the crash site of United Flight 93 in Shanksville, Pa. Officials announced Friday, June 1, 2018, that later in the year, the National Park Service will return the remaining wreckage of United Flight 93 to the Pennsylvania memorial marking where it crashed in the 9/11 terror attacks, and the remaining wreckage will be buried in a restricted area accessible only to loved ones of the victims. (AP Photo/Gene J. Puskar, File)
FILE – In this Sept. 16, 2001, file photo, FBI investigators continue excavating the crash site of United Flight 93 in Shanksville, Pa. Officials announced Friday, June 1, 2018, that later in the year, the National Park Service will return the remaining wreckage of United Flight 93 to the Pennsylvania memorial marking where it crashed in the 9/11 terror attacks, and the remaining wreckage will be buried in a restricted area accessible only to loved ones of the victims. (AP Photo/Gene J. Puskar, File)
In this Thursday, May 31, 2018 photo, visitors to the Flight 93 National Memorial visit the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
In this Thursday, May 31, 2018 photo, visitors to the Flight 93 National Memorial visit the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
Visitors to the Flight 93 National Memorial pause at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
Visitors to the Flight 93 National Memorial pause at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
Visitors to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
Visitors to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
A visitor to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
A visitor to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is an American Flag placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is an American Flag placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
A visitor to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
A visitor to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is an American Flag placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is an American Flag placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is an American Flag placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is an American Flag placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is an American Flag placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is an American Flag placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is an American Flag placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is an American Flag placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
Visitors to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
Visitors to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
American Flags are placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
American Flags are placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
A visitor to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
A visitor to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
A visitor to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
A visitor to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
A visitor to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
A visitor to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
American Flags are placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
American Flags are placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
Visitors to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
Visitors to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
American Flags are placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
American Flags are placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
A visitor to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
A visitor to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
A visitor to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
A visitor to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
A visitor to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
A visitor to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
This is the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
Visitors to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
Visitors to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
Visitors to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
Visitors to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
American Flags are placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
American Flags are placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
American Flags are placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
American Flags are placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
Visitors to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
Visitors to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
American Flags are placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
American Flags are placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
American Flags are placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
American Flags are placed at the Wall of Names at the Flight 93 National Memorial on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
Visitors to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
Visitors to the Flight 93 National Memorial pauses at the Wall of Names containing the names of the 40 passengers and crew of United Flight 93 that were killed in this field on Sept. 11, 2001, on Thursday, May 31, 2018. Later this year, the remaining wreckage of Flight 93 will be returned to the Flight 93 National Memorial to be buried in the restricted access zone, in the woods beyond the Wall of Names marked by a giant boulder, where they will not be accessible to the public or media. (AP Photo/Gene J. Puskar)
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