Travel Scare at 103 stories: Coating cracks on glass ledge of Chicago skyscraper, worrying tourists June 14, 2019Morgan Hines, USA TODAYComments Off on Scare at 103 stories: Coating cracks on glass ledge of Chicago skyscraper, worrying tourists The protective coating cracked at Willis Tower in Chicago on Monday. The crack posed no danger to tourists, but was scary to some.