CHICAGO (WPVI) -- Video posted to social media showed cracks on the glass floor of The Ledge attraction at Willis Tower in Chicago on Monday. The video was posted by a Skydeck visitor on Facebook. A ...

CHICAGO -- Video posted to social media showed cracks on the glass floor of the Ledge attraction at Willis Tower on Monday. The video was posted by a Skydeck visitor on Facebook. A spokesperson for ...

Alejandro Garibay CHICAGO (WPVI) -- The Willis Tower Skydeck's The Ledge cracked - but it's supposed to, according to a spokesperson, who said only the protective coating of the glass box that ...

Visitors to the Willis Tower's SkyDeck got an extra scare Monday when the attraction's protective layer covering the glass splintered into thousands of pieces. The Willis Tower told CNN affiliate WBBM ...

The cracks formed after a group of visitors to the Skydeck at the Willis Tower stepped out on the Ledge, but Willis Tower officials said the glass itself did not crack, only the protective coating.