1 / 501
FILE - This Sunday, Sept. 11, 2005 file photo shows the "Memory and Light" monument designed by Daniel Libeskind, the architect who created the master plan for reconstruction at ground zero, in Padua, northern Italy. Italy marked the fourth anniversary of the 9/11 attacks with a new glass and steel memorial monument that incorporates a twisted steel beam from the World Trade Center. (AP Photo/Luigi Costantini)

9/11 Memorial Site at Ground Zero

The National September 11th Memorial & Museum