I was waiting at the bus stop today to get home from HS and saw a plane that I am unsure of the type landing at Davis Monthan AFB. It was a 747 with a that was overall white with a blue band running along the fuselage. It had NO markings that i was able to observe except for a large US flag on the rudder. It also had a large white fairing on top of the normal 747 hump. i think it was a NECAP (E-4b?) but am unsure. anyone know what this was?