There's something about that man in the photo, the Cuban revolutionary with the serious eyes, scruffy beard and dark beret. Ernesto "Che" Guevara is adored. He is loathed. Dead for nearly 40 years, he is everywhere — as much a cultural icon as James Dean or Marilyn Monroe, perhaps even more so among a new generation of admirers who've helped turn a devout Marxist into a capitalist commodity. ADVERTISEMENT Of all the pop culture images that surround us, it is Guevara's face — immortalized in the photograph taken by Alberto "Korda" Diaz Gutierrez — that often stares at us, from...