A UFO has disrupted air traffic in Bremen for three hours. There is no question that it was real, as it was observed physically and on radar. It was never identified, and stopped air traffic while it hovered silently in the flight path for hours.
What if this happened over JFK? The US government would probably come up with some lie that would be slavishly transmitted by the captive media, but what if it happens over 10 airports? 20? What will they do then?