A documentary about men who are courageous enough to risk their lives undertaking challenges, sports-related and not, that are at the limit of human capabilities.

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Main Cast: Van Heflin, Red Adair, Art Arfons, John Craig, Chet Jessyck, Carlos Roman, Don Wilson

Director: William Friedkin

Writer: Don Bresnahan

Editor: Bud S. Smith

Cinematographers: Ángel Bilbatúa, Bob Bukor, Bill Butler, Miki Carter, James Crabe, Doyle Fields, Vilis Lapenieks, Grant Rohloff, Primo Sanchez, Bud S. Smith

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