My ex h's dad was a fighter pilot in VietNam. He had some hair-raising tales! Particularly, something I hadn't considered, is that they had to do the mission and drop their payload or it might not be possible to land safely.
He once flew almost an entire tour (that's a year in the US) with a bloke who was safe as houses. Then one mission he freaked out! Ex FIL was about 24 years old. He said they were dropping in altitude, getting shot at, the guy was going Section 8/crazy, vomitting into his mask, and they still had to get rid of the payload.