Las Vegas Sun - Photograph : Chicago's Willis Tower Reopens

January 20, 2018

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People stand on the floor of one of four transparent ledges that jut out from the 103rd floor of the Willis Tower in Chicago on Thursday, May 29, 2014.

M. Spencer Green / AP

People stand on the floor of one of four transparent ledges that jut out from the 103rd floor of the Willis Tower in Chicago on Thursday, May 29, 2014.