There's a pretty long text on its fuselage, and it almost looks like it says "United States Air Force" in full, rather than the usual "U.S. Air Force" abbreviation?
And it should be noted that the previous text on this C-20 was "United States of America". Like in this photo of its sistership, taken at Ramstein an-hour-or-so after 92-0375 had landed:
Regards,
Stephan