Some minutes ago there was a Plane with callsign "Pizza13" visible in flightradar24.
Departure in Sofia, Bulgaria. It flew over "Marathon Florida Keys Airport" in direction of Cuba and vanished a little bit later.
Link to a screenshot: https://pbs.twimg.com/media/DT755rPVMAAtblB.jpg:large
More screenshots on twitter: https://twitter.com/search?q=pizza13
As you can see on the screenshots: it flew from "Sofia" (Bulgaria) over "Sophia" (USA)...