Thomas P. Stafford

Thomas Patten Stafford (born September 17, 1930; Lt Gen, USAF, Ret.) is an American former Air Force officer, test pilot, and NASA astronaut.
Stafford commissioned in the United States Air Force, flying the F-86 Sabre prior becoming a test pilot. 
He was selected to become an astronaut in 1962, and flew aboard Gemini 6A and Gemini 9. 
In 1969, Stafford was the Commander of Apollo 10, the second crewed mission to orbit the Moon and the first to fly a Lunar Module in lunar orbit, descending to an altitude of nine miles.
In 1975, Stafford was the commander of the Apollo-Soyuz Test Project flight, the first joint U.S.-Soviet space mission.