FILE- In this Jan. 30, 1962 file photo, the Great Wallendas walk the high wire during their three-tier seven-person pyramid performance at the State Fair Coliseum in Detroit, Michigan. During the performance the pyramid formation collapsed and the performers fell to the ground injuring performers Jana Schepp and Mario Wallenda, as well as killing performers Richard Faughnan and Dieter Schepp. From left to right, bottom row, are, Dieter Schepp; Mario Wallenda; Richard Faughnan and Gunther Wallenda. From left ro right in the second row are Karl Wallenda and Herman Wallenda. Sitting on chair is Jana Schepp. On Friday, June 15, 2012, Karl’s great grandson, Nick Wallenda, will attempt a high wire walk over Niagara Falls on live television, hoping to write his famous family's name into the 153-year-old legend of daredevils who've "conquered" the natural wonder. (AP Photo, File)