So no IFF squawk? WTH?
Ukrainian blackmarket ?
Three possibilities:
1.) It was flying in formation with the U.S. Drone, and not resolvable.
2.) The U.S. drone was not equipped with a Mode-5 transponder, or the U.S. base did not have a Mode-5 interrogator.
3.) Iran hacked Mode-5. (Remote chance. Even if they did, they would not squander that advantage for what was a pinprick raid. What would China or Russia pay for that advantage?)
So no IFF squawk? WTH?>>>>>>>>>>>>>>>>>>
Somewhere there is a radar tech who is really in the hell can.