What Did the Trump Administration Know About High Altitude Surveillance?

I'm not one of these people who says, well, if we do over flights, they get to do over flights. That's not my philosophy. We shoot down theirs. They can try to shoot down ours. And so, they're really fascinating Cold War history. But as far as how we responded to it, how we handled it, what the, then it's what did the Trump administration know and when did it know about alleged over flights? I am taking a let's wait and see approach to this.