" Is it real?"
I have no idea, but I doubt it. Some passenger would have blabbed to the media by now. Plus, the airport would most likely have been shut down (potentially with others). I doubt the government would take the chance of knowing there was definitely a missle attack and not thinking if there was one, there may be others at the same time (like multiple 9/11 planes).
I think you're right. This would be impossible to keep quiet. Thanks ...
What if no one knew what it was when it happened? During the flight, Passenger #2 and #9 start talking about the flash of light they saw stream by the plane. Once they land, they go to the authorities and tell their story. Said authorities start interviewing the other passengers and crew.