Weather postpones trade center's ascent to tallest - Article Photos 1/3

FILE - One World Trade Center rises above the lower Manhattan skyline, April 13, 2013 in New York. It is already New York’s tallest building. But when the last pieces of its spire go up to the roof Monday, April 28, the 104-floor skyscraper will be one step away from becoming the highest in the Western Hemisphere. (AP Photo/Mark Lennihan, File)