Today is the birthday of astronaut Ken Mattingly (March 17, 1936) and Gary Sinise (March 17, 1955), the actor who played Mattingly in Apollo 13.

Mattingly was originally the command module pilot for the ill-fated Apollo 13 mission but was replaced three days before launch after exposure to measles. He later went to the Moon as command module pilot for Apollo 16 and was commander of two Space Shuttle missions.