This is a cat and mouse game that we've been playing for decades. USA has surveillance aircraft in the air at all times, especially near ADIZ. It also has at least one of two national command and control aircraft in the air at all times. The USA has been probed more times than can be counted, and we've probed other countries just as much. What's new is ignoring a threat while over territorial waters or sparsely populated areas and letting it glide across the country before deciding to shoot it down.
I don’t think that’s new based on the most recent incident. I recall the pentagon saying this has been going on for a few years. But if, by saying new you mean the last decade, that’s fair.
