There are two mysterious USAF C-32B at the same time in Europe
The USAF operates a couple of white Boeing 757 (military type C-32B) with no serials numbers. These aircraft are used for some mysterious operations for the US by the Foreign Emergency Support Team (FEST). FEST responds to threats to US citizens.
At December 18, 2024 two C-32B aircraft were in Europe. There is no information about the purpose of these flights.
C-32B with no serial but likely internally documented as 02-5001 flew Frankfurt to Stuttgart at 12:02 UTC on December 17 2024. This aircraft cannot be tracked using sites like Flightradar or ADSBexchange. It is identified as 02-5001 because its unique window layout. This video was make at Frankfurt when the aircraft departed to Stuttgart.
At December 18 2024 another C-32B registered 00-9001 flew from Prestwick to Vienna in Austria. The aircraft departed Wrightstown in the US at December 17.
More on the USAF C-32B aircraft in this article.