How I climbed a 3,000-foot vertical cliff — without ropes Alex Honnold

TEDTalks مجتمع وثقافة by TED

Imagine being by yourself in the dead center of a 3,000-foot vertical cliff — without a rope to catch you if you fall. For professional rock climber Alex Honnold, this dizzying scene marked the culmination of a decade-lo...View more