1965    Cosmonaut Aleksei Leonov, leaving his spacecraft Voskhod 2 for 12 minutes, becomes the first person to walk in space.

1965    Launch of ''Gemini 4'', the first multi-day space mission by a NASA crew. Crew-member Ed White performs the first American spacewalk.

1972    Apollo program: Eugene Cernan and Harrison Schmitt begin the third and final Extra-vehicular activity (EVA) or "Moonwalk" of Apollo 17. This is the last manned mission to the moon of the 20th century.

1972    Apollo program: Eugene Cernan is the last person to walk on the moon, after he and Harrison Schmitt complete the third and final Extra-vehicular activity (EVA) of the Apollo 17 mission. This is the last manned mission to the moon of the 20th century.

1995    Space Shuttle astronauts Bernard A. Harris, Jr. and Michael Foale become the first African American and first Briton, respectively, to perform spacewalks.