The Tallest Elevators On Earth Are Being Tested In an Old Mineshaft

Jeddah's Kingdom Tower will be taller than any other structure ever built. At more than one kilometer high, this supertall will require feats of engineering that, until now, have been the stuff of science fiction. Like the world's tallest, longest, and fastest elevators—which are being developed in a mine shaft in… » 6/09/14 3:02pm 6/09/14 3:02pm