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Nik Wallenda walked on a tightrope strung 600 feet in the air during a 750-foot trek from Marina City over the Chicago River to the Leo Burnett Building.
Nik Wallenda’s Chicago wire walk
Chris Sweda, Chicago Tribune
Nik Wallenda walks down Wacker Drive while surveying the area where workers are preparing to hoist the wire he will use to walk high above the Chicago River. 
