Astronauts Ed White and Jim McDivitt prior to the Gemini 4 flight, June 1965.
The Gemini 4 flight was a 4 day, 66 earth orbit mission. The mission also features White doing a 20 minute space walk – the first American space walk.
Ed White later became one of the first American Astronauts to perish when Apollo 1 went up in flames.
(via Apollo Program)