BROMA75 out of Travis AFB headed across the other pond…
This bird is belongs to the 486th Flight Test Squadron. The 486th Flight Test Squadron is a secretive United States Air Force unit with a misleading designation, assigned to Eglin Air Force Base, Florida, which is associated with activities of the U.S. State Department Foreign Emergency Support Team and Central Intelligence Agency Special Activities Center.
This bird is also known to be used to support the US Foreign Emergency Support Team, and was in use after Beirut blew up in August of 2020.