"Apollo 11, One Small Step for Man, One Giant Leap for Mankind" is a famous phrase spoken by astronaut Neil Armstrong when he became the first person to set foot on the Moon on July 20, 1969. The actual quote goes like this:<br /><br />"That's one small step for [a] man, one giant leap for mankind."<br /><br />The "a" in brackets was later claimed by Armstrong to have been lost in transmission, making the phrase sound like "That's one small step for man." The quote is significant because it marked a historic moment in human space exploration when humans first landed and walked on the Moon. Apollo 11 was a monumental achievement for NASA and the United States, and it represented a major milestone in the broader exploration of space.