Once had a pilot point out an "A320" while in a holding pattern over NY. Turned out to be a 757.



Also, on my only flight that has ever diverted, I saw a VC-25 (apparently, the President was not on board). Ask the pilot after a safe landing and he said that it was probably the first time ever a commercial jet got clearance over the Presidential plane.

Not a good photo but I doubt I'll ever get the chance again to fly overhead of Air Force One.