Conversation so far:
when did the man walk on the moon
Neil Armstrong became the first person to step onto the lunar surface on July 21 at 02:56 UTC.
what mission was neil armstrong on
Apollo 11 was the spaceflight that first landed humans on the Moon.
what was the duration of the apollo 11 mission
Apollo 11's mission duration was 8 days, 3 hours, 18 minutes, 35 seconds.

Question: what was the famous quote
Self-contained rewrite: what was the famous quote neil armstrong said