A combat infantryman during WWII, he served as a librarian for the Armed Forces Network after the war and sang with an army big band in occupied Germany.
Rumsfeld is the only person to serve twice as Pentagon chief. The first time, in 1975-77, he was the youngest ever. The next time, in 2001-06, he was the oldest.
Schultz was the longest serving secretary of state since World War II and had been the oldest surviving former Cabinet member of any administration. The former Marine Corps artillery officer was 100.