But one seemed almost unbelievable a space walk.

VOA: special.2009.06.24

They had made the first space walk.

VOA: special.2009.06.24

The delays forced NASA officials to shorten the shuttle's mission by one day and eliminate one space walk.

VOA: standard.2009.03.15

During the two-and-a-half hour moon walk, the astronauts frolicked in the weightlessness of outer space and planted an American flag in the lunar surface.

VOA: standard.2009.07.16

Astronaut Bobby Satcher became the second African-American to space walk.

VOA: standard.2010.02.02

But earlier,Buzz Aldrin the second man to walk on the moon took part in a NASA news conference where he pushed for a new round of space exploration, with the goal of sending astronauts to Mars.

VOA: standard.2009.07.20