Kevin Jorgesen, a climber since the age of 12, clings with fingertips to the face of El Capitan. On the right is the Thank God Ledge -- a 40ft-long sliver of granite on Half Dome and the only way to get beyond the Visor, a massive roof that looms over Half Dome's Regular Northwest Face route. Most people crawl, but Alex Honnold (pictured), who became a celebrity in 2008 when he first climbed the famed route without a rope, prefers to face the 1,800ft void beneath him. (Jimmy Chin/National Geographic Stock)