BY STAV ZIV
Updated | Tommy Caldwell and Kevin Jorgeson have been on a daunting mission that began at the tail end of 2014. On December 27, after years of preparation, they set out to free climb the Dawn Wall route on El Capitan, a steep slab of exposed granite at Yosemite National Park in California.
On Wednesday afternoon at 3:30 p.m. local time, the pair made history when they became the first to complete a free climb—i.e. a climb without any assistance using only the hands and feet to move up, attached to a rope only in case of a fall—of what is considered one of the most difficult routes in the world.
“It’s an amazing feeling to accomplish something you have devoted your life to for years,” Jorgeson is quoted as saying in a press release from sponsor Adidas Outdoor. “Free climbing the Dawn Wall had been considered impossible. Tommy dreamed it could be done, and I could not be more honored to have been his partner on this journey. I hope it might inspire others who may not have been familiar with rock climbing to experience it for themselves, and I’m looking forward to mapping out my next objective.”
http://www.newsweek.com/yosemite-climbers-make-history-reach-top-el-capitan...
http://www.scienceclarified.com/Ro-Sp/Rocks.html
http://abcnews.go.com/Sports/wireStory/men-free-climb-yosemite-wall-conside... 
