CNN Early Start With John Berman and Christine Romans May 30, 2014 08:17:00
One of these glass boxes hanging off the observation deck on the willis tower -- there are four in total -- one had to be shut down after this. the glass seemingly started to crack, terrifying those inside. >> i hear the crack and i feel the crack on the palm of my hand and my hand, i feel like glass just completely shattered or cracked, however you would like to say it, and i just feel that. and as soon as i feel it and i hear it, i look down and i'm like, oh, my god. >> officials at the tower insist no one was ever in danger. it was just the coating that cracked, not the underlying structure...
Source: archive.org