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Glass Skydeck on 103rd floor of Chicago tower CRACKS under terrified visitors' feet | Daily Mail Online
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New Willis Tower observatory attractions may include rappelling from the 103rd floor - Curbed Chicago
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Visitors' Worst Nightmare Comes True As The Glass Floor On 103rd Floor Shatters Under Their Feet | Glass floor, Willis tower skydeck, Breathtaking views
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Hanging off the edge of the Willis Tower observation deck on a glass floor 102 stories up, Chicago, Illinois Stock Photo - Alamy
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