Maybe the Aurora?
No, they’d never know it was there.
The US almost certainly uses UAVs in particularly hot areas-that won't cause risks to anyone.
If you are thinking of the likes of RQ-4 over North Korea then that is wrong also. The RQ-4 is still as vulnerable as the use of a U-2S over hostile territory. The North Koreans would have been launching SAMs by the dozen at any intruder deep in its airspace. Even downing UAVs would be valuable propagada for the North Koreans and something the US seeks to avoid. The recce flight are all periphery
The North Koreans are simply blowing hot air over the number of race-track patterns they observe along the mainland border and sea borders. The last over recce flights of North Korean airspace was when the SR-71 was in service.
Maybe the Aurora?
No, they’d never know it was there.