Record-breaking daredevil Nik Wallenda completed Sunday what he had called his most challenging feat to date: a tightrope walk between two skyscrapers 600 feet above downtown Chicago.
The seventh-generation aerialist's "Skyscraper Live" walk was broadcast on Discovery.
The walk consisted of two parts, starting from Marina City's West Tower, about 588 feet high. He crossed above the Chicago River to the Leo Burnett Building, finishing 671 feet above the street, according to Skyscraper Live's website.
After he returned to the West Tower, he crossed to the East Tower blindfolded as he braced against estimated wind gusts up to 50 miles per hour.