I heard this from a friend who retired from AD USAF many years ago.
He purchased a house from a separating AF pilot back in the 1980s. This pilot was hired by AA. In the attic, he left behind some copies of his airline applications. Two of those applications were to DL and AA.
My friend said this question, as posted by Iron Maiden, was posed on both applications. My friend said one read something like this "ever since joining the AF, I came across many ANG and AFRes pilots who said nothing but good things and ever since meeting these people, I wanted to fly for the best airline around and that's American Airlines." There was a small problem in that he used a word processing program to do this and the above statement appeared on his Delta application.