Alex Honnold free solos a 5.12d route on El Capitan. WHAT.
Rock Climb Wayward Son, Yosemite National Park
How does Alex Honnold's free solo climbing route (Freerider) up El Capitan compare to the other available El Capitan routes in technical and physical difficulty? - Quora
A Record-Setting Climb Up El Capitan, Without Ropes - The New York Times