Another chemtrail in our sky. I really like the term chemtrail, although formally they're called contrails. They're very chemical indeed. Lots of dihydrogen monoxide (DHMO, very, very dangerous) surrounded by concentrated nitrogen with some oxygen and argon. 1/
If you want to know more about DHMO, here's a good link: https://en.wikipedia.org/wiki/Dihydrogen_monoxide_parody
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.