Extreme athletes live-tweet one of the world's most grueling free climbs — mashable.com

To those safe on the ground, Kevin Jorgeson and Tommy Caldwell are just two tiny specks on the otherwise unbrokenly smooth half-mile high stretch of granite that is the Dawn Wall of Yosemite National Park's El Capitan. But pull out a phone and one can see the world from their perspective: panorama views of dizzying drops, the vertical campsites where they eat, sleep and even watch Netflix and the day-to-day struggles they face as they inch their way towards a next-to-impossible goal.

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