Nik Wallenda practicing in Niagara Falls, New York for June walk, photo bobc1369

Nik Wallenda practicing in Niagara Falls, New York for June walk, photo bobc1369

Nik Wallenda practicing for June 15 attempt to cross the Falls, photo bobc1369

Nik Wallenda practicing in Niagara Falls, New York for June 15, 2012 attempt to cross Niagara Falls. Photo by bobc1369/flickr.

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On the one hand, yoga is a physical exercise, a practice that can help calm and focus the mind. It is also a wholistic...