Originally Posted by paul3
I don't know what is the tallest building in U.S.. I've never been in U.S since birth.
Currently it's the Sears Tower in Chicago, with 108 floors it's 442 meters to the roof and 527 meters to the antennas.
It will soon arguably be the new 1WTC in NYC, with 105 floors, 417 meters to the roof, 428 meters to the crown and 541 meters to the top of the spire.
I'm sure with in the next decade or so a plan to build a taller one will emerge.