Houston, Tranquillity Base here. The Eagle has landed. - Neil Armstrong

I'm quite certain that we'll have such [lunar] bases in our lifetime, somewhat like the Antarctic stations and similar scientific outposts, continually manned.

I can't hear it. But the 'a' is implied, so I'm happy if they just put it in parentheses. (1982)

I would hope that history would grant me leeway for dropping the syllable and understand that it was certainly intended, even if it was not said — although it might actually have been. (2008)

Our autopilot was taking us into a very large crater, about the size of a big football stadium with steep slopes on the crater covered with very large rocks about the size of automobiles that was not the kind of place that I wanted to try to make the first landing.