The stunning, never-before-told story of Ruben "Doc" Cavazos, international president of the Mongols Motorcycle Club When Ruben "Doc" Cavazos changes his clothes at daybreak, he is no longer a CAT scan technician at the University of Southern California Medical Center. He becomes the man known--and, in a few special cases, feared--as Doc, international president of the Mongols, the fastest-growing and most closely watched organization of...