Ernesto "Che" Guevara's famous beret is gone. His iconic beard is filthy and matted against skeletal cheekbones. One bushy eyebrow arches over his half-open eyes. As a Bolivian country surgeon methodically saws off his lifeless hands, Che appears vaguely amused. Gustavo Villoldo, a stocky figure in green army fatigues, stands just inside the tiny laundry room where the Cuban revolutionary's corpse rests atop a sink. For five months, the CIA operative has led soldiers hunting Guevara through the rough crags and valleys of southern Bolivia. Less than 24 hours ago, his team had captured and executed him in a village...