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Tightrope walker Nik Wallenda walks the high wire from the U.S. side to the Canadian side over the Horseshoe Falls in Niagara Falls, Ontario June 15, 2012. Wallenda, a member of the famed "Flying Wallendas" family of aerialists, completed a historic tightrope crossing through the mist over Niagara Falls Gorge on Friday, stepping from a 2-inch wire onto safe ground in Canada to wild cheers from a crowd of thousands. REUTERS/Fred Thornhill (CANADA - Tags: SOCIETY) REUTERS