On August 7, 1974, a 24-year-old French high-wire artist named Philippe Petit committed one of the most astonishing performance stunts of the late 20th century: he strung a thin cable in between the two towers of the World Trade Center and not only walked across, from one building to another, but did a nerve-wracking series of knee-bends and acrobatic movements on the cable, some 1,350 feet above the ground, before turning himself in. This occurred to the consternation and chagrin of Port Authority policemen, who immediately arrested Petit for the act -- prompting many to dub Petit's stunt "the artistic crime of the century." James Marsh's documentary Man on Wire revisits and recounts this chain of events some 34 years after they occurred.