Nik Wallenda is a 7th-generation member of the famous circus daredevil family, whose incredibly dangerous Flying Pyramid high wire act led to several deaths in the 1960s. Nik has now topped his late great-grandfather Karl by walking safely across Niagara Falls on the tight rope. ABC News, which broadcast the event, forced him to wear a safety tether tied to the wire for the first time in Wallenda’s career.