SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
First space walk. Soviet (CCCP) cosmonaut Alexei A. Leonov (born 1934) performing the first space walk in history on 18 March 1965. A space walk, or extravehicular activity (EVA), involves leaving a spacecraft while it is in space. Leonov left the Voskhod 2 spacecraft through an inflatable airlock and spent 10 minutes outside the spacecraft. This historic accomplishment almost ended in disaster when Leonov's spacesuit over-inflated and he had to partially deflate it to fit back through the airlock. Pavel Belyayev, mission commander, stayed inside Voskhod 2. Leonov became a celebrity in the Soviet Union and around the world.
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