I've already mentioned Apollo 11, which launched on July 16, 1969.
But this day also marks:
- The death of JFK, Jr. and Carolyn Bissette Kennedy in a plane crash off Nantucket (10 years ago today)
- Catcher In The Rye published (1951)
- The execution of the Romanovs, including — yes, people — Anatasia (1918)
- The designation of Washington DC as this nation's capital (1790)
- The birthday of Corey Feldman (1971)
Okay, maybe that last one isn't as important.