Renowned rock climber Alex Honnold has achieved what fellow climber Tommy Caldwell has called "The 'moon-landing' of free-soloing.
Honnold, 31, scaled Yosemite National Park's famous 3,000-foot peak El Capitan in 3 hours, 56 minutes, with National Geographic capturing parts of the climb. It is already considered by many to be the most dangerous free-solo (scaling a peak without ropes or safety gear) climb to ever be completed.
Here's National Geographic's exclusive photo of Honnold after completing his climb.
Honnold has been training for the climb for more than a year and planning it for even longer, using various locations in the United States, China, Europe and Morocco.