82_8000 (AF1): https://globe.adsbexchange.com/?icao=adfdf8
00-9001 USAF Spec Ops B752: https://globe.adsbexchange.com/?icao=ae0443 - https://buckrail.com/plane-white-aircraft-airport/
Global Hawk MQ-4C drone: https://globe.adsbexchange.com/?icao=ae5c71 Local time 1321 ET
No one knows. In normal world, the callsign changes to AF1 when POTUS is aboard. 82_8000 when no POTUS.