If they are flying B-2s, things just got serious. I wonder what they thought when they couldn’t detect them?
B-2s are detectable by modern AA radar systems and have been for a decade. They can’t be seen well enough to get a missile lock but you can tell something is there well enough to vector fighters to check it out. Or blanket the area with AA.
The F-117A brought down in the Balkans was brought down because the plane was detectable but not localizable. So the Balkanites blanketed the area and an ancient SA-2 blew the stealth fighter out of the sky.