This combination made from file photos shows Willis Tower, formerly known as the Sears Tower, in Chicago on March 12, 2008, left, and One World Trade Center in New York on Sept. 5, 2013. Soaring above the city at 1,776 feet, 104-story One World Trade Center is in contention with Willis Tower for the title of America’s tallest building. A committee of architects recognized as the arbiters on world building heights is meeting Friday Nov. 8, 2013 in Chicago to decide whether a design change affecting One World Trade Center’s needle disqualifies its hundreds of feet from being counted, which would deny the building the title of nation’s tallest giving the title to the 110 story Willis Tower at 1,450 feet. (AP Photo)