On this date in 1945, American forces invaded Okinawa, Japan.
On this date in 1965, Soviet cosmonaut Aleksei Leonov made the first ‘spacewalk’ as he left a Voskhod 2 capsule and floated outside it for twenty minutes, secured by a tether.
On this date in 1967, N.A.S.A.’s incompetence and negligence caused astronauts ‘Gus’ Grissom, Edward White, and Roger Chaffee to die in a fire in Apollo spacecraft during a rehearsal in Cape Canaveral.