Jumpers, climbers, fliers and more: Great daredevils of the last 100 years
From NBCNews.com: This Sunday, daredevil Nik Wallenda — who famously traversed Niagara Falls on a tightrope last year — will attempt another extreme balancing act: walking a tightrope over the Grand Canyon. Wallenda carries on a family tradition with his tricks — he is the seventh generation of the “Great Wallendas,” a stunt-performing family. And he calls to…