Changes

[[1958]] – [[NASA ]] launches the lunar its first space probe , "Pioneer 1," though it fails to achieve a stable orbit around [[Earth]]'s [[Luna|moon]].<br />[[1968]] – [[NASA ]] launches "Apollo 7, " the first successful manned Apollo mission, with astronauts Wally Schirra, Donn F. Eisele and Walter Cunningham aboard.<br />[[19842000]] – Aboard the Space Shuttle Challenger, astronaut Kathryn D. Sullivan becomes the first American woman to perform a space walk.<br />[[2000NASA]] – The 's 100th Space Shuttle mission (STS-92) is flown.<br />