After college, my brother joined the Air Force during the era of the Vietnam War. He had wanted to be a pilot, but was assigned as the navigator/bombardier in an F-111, a fighter being tested in the New Mexico desert. He and the pilot died in December of 1973 when the jet crashed.
There's a memorial in Clovis, New Mexico for all those who died in the F-111, which you can see here.
Next Monday, on Memorial Day, please remember those who have served our country. There are no greater heroes.