"'The Kolbs dangled from ropes, clung to sheer cliff walls by their fingertips, climbed virtually inaccessible summits, ran seemingly impassable white-water rapids, braved the elements, and ventured into unknown wilderness--all for the sake of a photo. Well, a photo and a thrill. Sometimes it was hard to tell which was more important.' Ellsworth and Emery Kolb arrived at Grand Canyon in 1902 to seek their fortune at the remote, breathtaking chasm....