Not sure if this has been shown on TV before?
Philippe Petit's Wire Walk Between the Twin Towers.
In August 1974, French wire-walker Philippe Petit spent nearly an hour walking, dancing, kneeling and lying on a wire which he and his friends had strung in secret between the rooftops of New York's Twin Towers. Six years of intense planning, dreaming and physical training fell into place that morning. Using contemporary interviews, archival footage and dramatic reconstructions, the film tells the story of this extraordinary feat.