Thomas and Alexander Huber rank as two of the best mountain climbers ever. Now the brothers set out to break the record in speed climbing the 2,900 foot sheer cliff known as 'The Nose' of El Capitan in Yosemite Valley. Extreme sports don't come any more extreme than speed rock-climbing. In their attempt to set a world record, the Hubers compress a three-day ascent for regular climbers into less than three hours. Intensive practice and split-second...