The music

Roy Webb was the in house composer for RKO in those days, yet there are segments of scoring throughout this film that are literally from Disney's "Victory Through Airpower"(also 1943),composed by Paul Smith.
RKO, as a rule distributed Disney films at this time but because they figured there'd be no money in "Victory", they let UA handle it.
Is it possible that RKO was initially interested in "Victory" and that's why some of Smith's scoring winds up in Bombardier before they handed it off to UA?
We'll never know.