Son of Sen. John McCain , the former GOP presidential candidate , graduates . Jack McCain shakes hands with Obama , who delivers commencement address . That grandfather later became Adm. McCain and was commander of the Pacific Theater during the Vietnam War , when Jack 's father , now Arizona Sen. John McCain , was being held as a prisoner of war in Hanoi . - May 26 : Obama vows to not send them to war unless it is `` absolutely necessary ''
Son of Sen. John McCain , the former GOP presidential candidate , graduates . Jack McCain shakes hands with Obama , who delivers commencement address . - May 26 : Obama vows to not send them to war unless it is `` absolutely necessary ''