Not all 707's are retired yet. Since there are only a handful of C-45A's (Military 757), other less important officials particularly under-secretaries or military dignitinaries fly on these aging aircraft. Either that or this plane is used to train Air Force or Air National Guard pilots on how to fly KC-135 or E-3 aircraft. Obviously, both these planes are 707 variants and they haven't been retired. Another possibility is a MAC (Mobile Air Command) flight carrying active/retired servicemen/ woman and their families. Some of those flights are operated on C-9's wearing schemes seen on Presidential or high ranking military officials aircraft, but inside it's all economy class seating. Those are the possibilities but none are accuate. Can anyone clear this up?