1 of 9: Nik Wallenda, a circus high-wire daredevil, walks on a wire 12 stories above the street in Newark, N.J., Wednesday, Oct. 15, 2008. On the way back Wallenda rode a bicycle on the wire. Wallenda was trying for a Guinness World Record for the longest distance and greatest height ever traveled by a bike on the wire. (AP Photo/Mike Derer)

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