On July 20, 1969, American astronauts Neil Armstrong (1930-2012) and Edwin "Buzz" Aldrin (1930-) became the first humans ever to land on the moon. About six-and-a-half hours later, Armstrong became the first person to walk on the moon. As he took his first step, Armstrong famously said, "That's one small step for man, one giant leap for mankind." The Apollo 11 mission occurred eight years after President John F. Kennedy (1917-1963) announced a national goal of landing a man on the moon by the end of the 1960s. All of the cameras used on the Apollo 11 mission stayed on the Moon, clearing space on the lunar capsule and bringing back to Earth 22 kilograms of lunar rocks that NASA scientists would then analyze. The nine rolls of film that were used, however, arrived [pdf] at the Houston control center at noon on July 25, 1969. They remained in the decontamination laboratory for 47 hours. Once developed and duplicated, the photographs taken by the Apollo 11 mission were presented to the press on August 12, 1969.