Just a couple of facts...the Tower stands 1,063 feet tall including it's antenna which is taller than the Chrysler building in NYC and its four support pillars straddle 3.5 acres of ground.
I sure hope you enjoyed your visit and I also hope your feet aren't as tired as mine!
P.S. - I may get myself back there and go up at least two levels. The lines were so long by the time I got over there that I wasn't even sure where they were going. They have about 4 different kinds of lines, I think. Lots of people were going up the stairs though...I think about maybe trying for level 1 where you can then get on the elevator and go the rest of the way but I suppose the smart thing would be to get on the elevator at the lowest level.