Stepping out at 120 miles above the Earth in 1965

On June 3, 1965, 120 miles above the Earth, Major Edward H. White II opens the hatch of the Gemini 4 and steps out of the capsule, becoming the first American astronaut to walk in space. Attached to the craft by a 25-foot tether and controlling his movements with a hand-held oxygen jet-propulsion gun, White remained outside the capsule for just over 20 minutes. As a space walker, White had been preceded by Soviet cosmonaut Aleksei A. Leonov, who on March 18, 1965, was the first man ever to walk in space. 

Read more at this link: https://www.history.com/this-day-in-history/june-3/an-american-walks-in-space