Photo by Corey Rich (@coreyrichproductions): Flex Luthor was the first 5.15a in the U.S., and it has yet to see a second ascent. Any takers? Here, my good friend Tommy Caldwell (@tommycaldwell) makes the first ascent of this "krypitc" testpiece up at the

Photo by Corey Rich (@coreyrichproductions): Flex Luthor was the first 5.15a in the U.S., and it has yet to see a second ascent. Any takers? Here, my good friend Tommy Caldwell (@tommycaldwell) makes the first ascent of this "krypitc" testpiece up at the Fortress of Solitude, Colorado in 2003. Hotels-live.com via www.instagram.com/p/BCi45xxioBb/ via http://flic.kr/p/EpWZby #link https://farm2.staticflickr.com/1598/25212565000_fa3f7c0614_b.jpg