"That's one small step for a man, one giant leap for mankind."
Read the interesting story of why it sounds like the "a" is missing, and how they discovered it. I feel so much better now, and I'm sure Neil Armstrong does too!
http://news.bbc.co.uk/2/hi/americas/5398560.stm
http://news.bbc.co.uk/2/hi/americas/5398560.stm