Where did you see the manifest?
http://www.dod.mil/pubs/foi/newyorkcityflyover/Air_Force_One_Flyover_Flight_Manifest.pdf
Note that all but the head AF One Pilot’s name was redacted. All those enlisted you see are going to be stewards. There is no reason to call this a training flight when this crew had been flying Obama around the world and would have been in training for ZERO becoming President after the election.