> And what exactly should be done about it? Historically for a large preponderance of cases, absolutely nothing. By law of international treaty that the USA si

> And what exactly should be done about it? Historically for a large preponderance of cases, absolutely nothing. By law of international treaty that the USA signed. https://en.wikipedia.org/wiki/Treaty_on_Open_Skies https://en.wikipedia.org/wiki/Treaty_on_Open_Skies We've since left the treaty though, so now our own spy planes can legally be shot down when they fly over Russia.