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Construction worker Ken Apple signs the last steel beam, along with other members of the crews that helped build the tower, before it is hoisted 977 feet to the top of Four World Trade Center on June 25, 2012 in New York City. The trapezoidal glass and steel office building, which is designed as an architectural backdrop to the September 11 Memorial, is scheduled to open in 2013. (Photo by Spencer Platt/Getty Images)

Final beam goes up at 4 World Trade Center

The steel construction of 4 World Trade Center is drawing to a close. Construction workers removed their helmets and looked on teary-eyed as the final steel beam of the tower was lifted into place Monday, June 25, accompanied by a rendition of "God Bless America" performed by gospel singer BeBe Winans.