Apollo 11 was the fifth manned mission in the US Apollo program, and the first manned mission to land on the moon. Launched on July 16, 1969, it was one of the defining moments of the 20th century. The crew consisted of three astronauts: Neil Armstrong, Buzz Aldrin, and Michael Collins. Armstrong became the first human to step on the moon, famously declaring "That's one small step for man, one giant leap for mankind." The mission marked a significant achievement for humanity and was seen as a victory for the United States in the Space Race against the Soviet Union. The success of Apollo 11 paved the way for future moon landings and further exploration of space.