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Pictures | Fri Jun 15, 2012 | 11:10pm EDT

Walking over Niagara Falls

<p>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. REUTERS/Mark Blinch </p>

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. REUTERS/Mark Blinch

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. REUTERS/Mark Blinch

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<p>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. REUTERS/Mark Blinch </p>

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. REUTERS/Mark Blinch

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. REUTERS/Mark Blinch

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<p>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. REUTERS/Mark Blinch</p>

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. REUTERS/Mark Blinch

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. REUTERS/Mark Blinch

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<p>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. REUTERS/Mark Blinch</p>

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. REUTERS/Mark Blinch

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. REUTERS/Mark Blinch

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<p>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. REUTERS/Mark Blinch (</p>

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. REUTERS/Mark Blinch (

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. REUTERS/Mark Blinch (

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<p>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. REUTERS/Fred Thornhill </p>

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. REUTERS/Fred Thornhill

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. REUTERS/Fred Thornhill

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<p>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. REUTERS/Fred Thornhill </p>

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. REUTERS/Fred Thornhill

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. REUTERS/Fred Thornhill

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