Today is the the 52nd anniversary of America’s first spacewalk, performed by NASA astronaut Edward H. White II on the afternoon of June 3, 1965 during the four-day Gemini IV mission. In NASA terminology spacewalks are also referred to as extravehicular activities, or EVAs—basically anything done outside the protection of a spacecraft. The video above shows footage of the historic Gemini IV EVA with narration by White himself. (Sound begins about 30 seconds in.)

The photo below was captured on medium-format film by fellow astronaut Jim McDivitt from inside the Gemini IV craft. It shows White free-floating in orbit during his EVA, holding the Hand-held Maneuvering Unit (or “zip gun”) that used canisters of propellant to move the user around. (You can see scans of the original photos from the mission here on ASU’s “March to the Moon” gallery.)

White was tragically killed just two years later on Jan. 27, 1967 in the fire that claimed his life and those of fellow Apollo 1 astronauts Gus Grissom and Roger Chaffee. But his legacy lives on each and every time an American astronaut “suits up” and opens a hatch to venture out into an alien environment, whether it’s in Earth orbit, on the Moon, on Mars…or somewhere we haven’t even thought of visiting yet!