Daredevil Nik Wallenda waves before walking along a tightrope between two skyscrapers suspended 500 feet (152.4 meters) above the Chicago River in Chicago, Illinois, November 2, 2014 (photo: Reuters)
Daredevil Nik Wallenda, steps out on the wire backwards, for a live television show before his tightrope walk uphill at a 15-degree angle, from the Marina City west tower across the Chicago River to the top of the Leo Burnett Building Sunday, Nov. 2, 2014 (Photo: AP)
Daredevil Nik Wallenda makes his tightrope walk uphill at a 15-degree angle, from the Marina City west tower across the Chicago River to the top of the Leo Burnett Building Sunday, Nov. 2, 2014 (Photo: AP)
Daredevil Nik Wallenda walks on a tightrope uphill at a 15-degree angle from the Marina City west tower across the Chicago River to the top of the Leo Burnett Building in Chicago, Sunday, Nov. 2, 2014 (Photo: AP)
Daredevil Nik Wallenda walks along a tightrope between two skyscrapers suspended 500 feet (152.4 meters) above the Chicago River in Chicago, Illinois, November 2, 2014 (Photo: Reuters)
Spectators watchs daredevil Nik Wallenda walk along a tightrope between two skyscrapers suspended 500 feet (152.4 meters) above the Chicago River in Chicago, Illinois, November 2, 2014 (Photo: Reuters)
Daredevil Nik Wallenda walks along a tightrope between two skyscrapers suspended 500 feet (152.4 meters) above the Chicago River in Chicago, Illinois, November 2, 2014 (Photo: Reuters)
Spectators watch daredevil Nik Wallenda walk along a tightrope between two skyscrapers suspended 500 feet (152.4 meters) above the Chicago River in Chicago, Illinois, November 2, 2014 (Photo: Reuters)
Daredevil Nik Wallenda performs his blindfolded walk along a tightrope between two skyscrapers suspended 500 feet (152.4 meters) above the Chicago River in Chicago, Illinois, November 2, 2014 (Photo: Reuters)
A large crowd waits to watch daredevil Nik Wallenda begin his walk on a tightrope uphill at a 15-degree angle from the Marina City west tower across the Chicago River to the top of the Leo Burnett Building in Chicago, Sunday, Nov. 2, 2014 (Photo: AP)