Currently in the lead is Oklahoma City's Legends Tower, a 1,907-foot structure that would be the tallest building in the U.S.

BETHLEHEM, Pa. - New construction is happening on the land where the Martin Tower once stood in Bethlehem. Buildings are going up on the 1100 block of Eighth Avenue.

NEW YORK - Fresh bread will soon be baking high above ground zero. The new World Trade Center got its first restaurant Wednesday - a sandwich shop at the top of the Freedom Tower under construction.