GRIMM01 a B52 from Minot AFB, ND flew across the world and is now patrolling the region just west of the Carpathian mountains and is entering Romania southbound from Hungary atm. This is a signal to Russia in the Ukraine region. Significant uptick.
REDEYE9 a JSTARS is patrolling in Estonia, bordering Russia.
Add to this all the UC12W Libertys that have been patrolling around Kaliningrad and the Reaper drones all over the Black Sea area and it looks like Eastern Europe is pressurizing.
These flights are done with transponders on, so they WANT to be seen.
Anon is ex-AF and a (retired atm) national/global career security officer and will not discuss unclassified observational analysis that in his opinion gives insight into what appear to be classified matters. That said, a lot of what goes on is interesting and informative and Anons can make of it what they will.