Video: Spectators watch elite climbers scale El Capitan

A pair of elite climbers are into their third week of an historic climb up Yosemite’s El Capitan.

The particularly difficult route up the so-called “Dawn Wall” is considered by many to be the most challenging in the world. Dozens of spectators watch daily from the Yosemite Valley floor as Tommy Caldwell and Kevin Jorgenson make their way to the top.