What's at the end of a chemtrail? Precious metal, of course. Usually aluminium is not considered a precious metal, but when it's packed in the form of an E3-A Sentry it really is. Were just 30 kilometres away from Russia's ally, Belarus. Those planes are here to detect threats.
I wouldn't be posting this picture had the airplane not been sending and ADS-B signal. Sometimes they don't send them, but this is not a secret mission, NATO wants Russia to see them. I just wish Russia finally lost and retreated. And the airplanes would stop scaring our dogs.