Son of Sen. John McCain , the former GOP presidential candidate , Lt . Jack McCain shakes hands with Obama , who delivers commencement address . He is the fourth cadet to graduate from the Academy . McCain 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 . He is the fourth McCain to graduate from Naval Academy . Obama vows to not send them to war unless it is `` absolutely necessary ''