In 1972, a Navy Seal named Thomas Norris carried out one of the most dangerous and daring rescue missions of the war in Vietnam. Six months later, he would be rescued himself, in an equally dramatic manner, after being shot through the head. His rescuer was fellow Seal, Michael Thornton, who had shrapnel wounds, but swam for three hours while carrying Norris, and a South Vietnamese commando. Both Norris and Thornton would go on to receive the Medal of Honor. They tell their remarkable war stories here - best friends, sitting side by side.