We've got a pretty interesting, and oddball flight headed to GITMO from Washington, DC. Not seen this one before from that airport. There have a been a select few from Camp Springs this year though.

It's a 22 seater Gulfstream IV, operated under "Phoenix Air".

https://flightaware.com/live/flight/GRB300/history/20210830/1145Z/KIAD/MUGM

https://flightaware.com/resources/registration/N48GL

Even though pics will not load, I added them anyways.