NIAGARA FALLS, CANADA - JUNE 15: Aerialist Nik Wallenda tightropes over the Niagara Falls June 15, 2012 in Niagara Falls, Canada. Wallenda walked across the 1,800 foot long, 2 inch-wide wire Friday night as the first person to cross directly over the falls from the U.S. into Canada. Wallenda, 33 and a father of three, is a seventh generation member of the famed Flying Wallendas who trace their roots to 1780 Austria-Hungary, when ancestors traveled as a band of acrobats, aerialists, jugglers, animal trainers and trapeze artists. ABC televised the event and insisted the daredevil wear a tethered harness to prevent live coverage of a potentially deadly fall 190 feet into the churning torrent below. (Photo by John Moore/Getty Images)