Michael Kuryla Jr. found strength from his fellow stranded Navy comrades floating in shark-infested waters of the South Pacific for nearly five days in 1945 during World War II. Their ship, the USS Indianapolis, sank in just 12 minutes after being hit by two Japanese torpedoes shortly after the ship had delivered the atomic bomb that would level Hiroshima. Three hundred of Mr. Kuryla's shipmates died that day when the ship went down. Nine hundred were left floating in only life preservers, facing a harsh sun and sharks, as three SOS calls went unanswered. An anti-submarine plane spotted them four...