Cracks in Willis Tower Bridge causes sky-high scare - YouTube
Coating crack temporally closes Skydeck at Chicago's Willis Tower
ABC 7 Chicago - THE LEDGE CRACKED: At 103 floors up, The Ledge at the Skydeck of the Willis Tower is scary enough on its own for many people. Now imagine that
Willis Tower horror at 412m as Chicago SkyDeck cracks underfoot - NZ Herald
Willis Tower Skydeck glass cracks under visitor - Latest News | Willis tower skydeck, Willis tower, Skydeck chicago
Willis Tower Skydeck Glass Cracks, Scares Living Crap Out of Everyone - Thrillist