[Yo-Yo]

It's what he meant to say but his line got messed up. Some claim the recording shows he actually got it right but it went down into history with the misquote. In either case you'll note I did not make it a "quote" but a quip instead.

Some, including Armstrong, blamed the VOX circuit on his radio with cutting off the word, but listening to the original transmission, he says:

"That's one small step for man, one"

Then he hesitates, and you can just imagine him think to himself "did I just screw up the one line I've been practicing in front of the mirror for the last five years?

Then he quickly finishes:

"giant leap for mankind."

[Yo-Yo]

The infamous quote: https://www.youtube.com/watch?v=HCt1BwWE2gA