It suddenly struck me that that tiny pea, pretty and blue, was the Earth. I put up my thumb and shut one eye, and my thumb blotted out the planet Earth. I didn't feel like a giant. I felt very, very small.

Houston, Tranquillity Base here. The Eagle has landed.

It doesn't sound like there was time for the word to be there. On the other hand, I didn't intentionally make an inane statement... certainly the 'a' was intended, because that's the only way the statement makes any sense.

I suspect that even though the various questions are difficult and many, they are not as difficult and many as those we faced when we started the Apollo [space program] in 1961.

I didn't feel like a giant. I felt very, very small.