This should be easy to verify. Like any commercial aircraft AF Two must be visible to and under the control of FAA ATCs. Those radio transmissions are on public frequencies. There are likely 1000s of folks who follow ATC conversations. So if true or false the evidence is in the open. I sometimes listen to the NYC Metro controllers in Westbury on my lttle C Crane Skywave. If AF 2 never left or did indeed turn around we should know soon.
Like any commercial aircraft AF Two must be visible to and under the control of FAA ATCs. Those radio transmissions are on public frequencies.
AF One and Two also have encrypted radio capabilities. In a wartime situation, you won’t be able to listen in without the same equipment and the cryptographic key of the day.
Somewhat related, in the same scenario, your GPS devices are going to be wildly inaccurate, unless, again, you have a military receiver with the cryptographic key of the day. (this is designed to prevent enemies from using known GPS coordinates to target US interests)