The real thing you should ask is, did "Bob" believe in UFOs before he/she became a pilot, or involved in the military? The military doesn't give people any more

The real thing you should ask is, did "Bob" believe in UFOs before he/she became a pilot, or involved in the military? The military doesn't give people any more information than they need, there's no reason to think that a highly trained pilot has any more information than they need to fly a very fast deathplane :)