Chicago skyscraper's viewing deck cracks under tourists' feet – 1,353ft up | Architecture | The Guardian
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The terrifying moment a tourist in a glass box 1,350ft high up sees floor CRACK under him | World | News | Express.co.uk
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Crackling glass coating scares visitors to Ledge
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Willis Tower SkyDeck ledge in Chicago cracks under visitors' feet | CNN
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Sears Tower unveils 103rd floor glass balconies
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Observation ledges at Chicago's Willis Tower have reopened - following cracked glass saga | Independent.ie
Visitors' Worst Nightmare Comes True As The Glass Floor On 103rd Floor Shatters Under Their Feet | Bored Panda
Willis Tower in Chicago - One of the World's Tallest Skyscrapers - Go Guides
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Willis Tower's renovated viewing point is not for the faint of heart
Willis Tower Skydeck | Chicago, IL | Things to do in Loop, Chicago
