Neil Alden Armstrong (August 5, 1930 – August 25, 2012) was an American astronaut who became the first person to set foot on the Moon on July 20, 1969, at 20:18:04 UTC (1:18:04 p.m. EDT) as a part of the Apollo 11 mission. As he took his first step onto the surface, he proclaimed, "That's one small step for [a] man, one giant leap for mankind."

Edwin Gene "Buzz" Aldrin Jr. (born May 20, 1930) is an American former astronaut, engineer, and fighter pilot. Aldrin was the pilot of the Apollo 11 mission, and is the second person to have set foot on the Moon, following Neil Armstrong. He remained on the lunar surface for over 21 hours.