In this April 15, 2011 file photo, a pair of construction cranes work on top of 1 World Trade Center in New York. Magazine publisher Conde Nast will sign a lease on Wednesday, May 25, 2011 for space ... more 
In this April 15, 2011 file photo, a pair of construction cranes work on top of 1 World Trade Center in New York. Magazine publisher Conde Nast will sign a lease on Wednesday, May 25, 2011 for space in the 1,776-foot skyscraper. The building will be the centerpiece of a redeveloped ground zero. less 
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Associated Press | Photo By Mark Lennihan, File
Tue, May 24, 2011 8:57 PM EDT