Hundreds of tiles in Denver International Airport's new Great Hall are cracked and missing grout

If you've been to Denver International Airport lately, you might have noticed the brand-new tiling that's part of the Great Hall Project is cracked in many places, and some tiles are held together with nothing but tape. Airport officials say some of the damage is from construction equipment rolling over the new flooring, and other tiles, they say, may have been cracked by train vibrations or the Zamboni cleaning machine. But others believe the problem is more serious.