Pirates. It would be amazing. Steal a state of the art aircraft, and keep a dozen countries stumped for days in regards to its whereabouts. Got to give them credit for their ambition and brass in doing it if that’s what happened.
Look at me. I’m the pilot now.
If it were an act of piracy, somewhere Blackbeard is raising a tankard of grog in salute, saying “Well done, me hearties!”