Walter CronkiteWALTER CRONKITE IV is an associate producer with CBS News. MAURICE ISSERMAN is the Publius Virgilius Rogers Professor of History at Hamilton College. His most recent book is the prize-winning Fallen Giants: A History of Himalayan Mountaineering from he Age of Empire to the Age of Extremes, co-written with Stewart Weaver, which the New York Times called "the book of a lifetime...an awe-inspiring work of history and storytelling." Read More Read Less