Looks like another normal day south and west of Ukraine on Flightradar 24 right now. One Global Hawk (FORTE 10) out of Sicily stooging around in the middle of the Black Sea, an RAF RC-135 Rivet Joint cruising the Romanian/Ukraine border (on way home probs), and an E3A Sentry AWACS doing circuits less than 100kms from the Polish/Ukraine border, not to mention the US C-130 that just took off in Romania heading northwest. They are all there in plain sight, out and proud with transponders on.
And this is just what you can see by randomly floating your cursor over plane symbols. Nothing unusual, I suppose, but it is real time.