Who was the first person to walk on the moon?

Neil Armstrong was the first person to walk on the moon during the Apollo 11 mission on July 20, 1969. As the commander of the mission, he famously stepped onto the lunar surface and declared, "That's one small step for [a] man, one giant leap for mankind." This historic moment was televised and witnessed by millions, marking a significant achievement in space exploration and the United States' space race against the Soviet Union.

Buzz Aldrin, who is also mentioned as an option, was the second astronaut to walk on the moon shortly after Armstrong. Yuri Gagarin was the first human to journey into space but did not land on the moon. John Glenn was the first American to orbit the Earth and later became a key figure in space exploration but did not participate in any moon landing missions. Armstrong's accomplishment remains a pivotal milestone in human history and space exploration.