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First of only three deep space spacewalkers in history. Only Ken Mattingly survives.
Of the 24 who flew to the moon, only 11 survive:
Moonwalkers:
Buzz Aldrin (11)
David Scott (15)
Charlie Duke (16)
Harrison Schmitt (17)
The entire crew of Apollo 8, still:
Frank Borman, Jim Lovell, Bill Anders (8)
Apollo 10 CDR
Tom Stafford (10), preceded in death by buddy Leonov
Profile-mission CMPs:
Mike Collins (11)
Ken Mattingly (16)
Anomaly mission LMP:
Fred Haise (13)
This leaves aside other astronauts, and the never-flew people from AGs 1-5. When those are added in something like 20 out of 55 are still alive, I've lost track.