I would guess 02-4452; A white one with just the flag, no roundel or US.A.F. titles? It flew to Greenville 29/5/2018 and has no mode-S history since. Since then the other McGuire-C32B, 00-9001, has mostly been doing local TERRA training-flights, and only a handful of missions far away....certainly l...
99-6143 was noted at Stuttgart on 21-1-2019 with 13 windows in the front part of the fuselage. Some pics of this visit at : https://www.strforum.de/viewtopic.php?f=9&t=15152 An extra, long, thin, antenna has now been installed on the front fuselage, also visible here in Dec 2018: https://www.flickr...
I received part of an ACARS message to UA947 AMS-IAD, which was still on the ground, talking about a medical diversion for a flight attendant with chest pains. Maybe related?