Heard a rumour a number of years ago, which I immediately discarded at the time. Someone said that the USAF used commercials for simulated target practice - hence the rumour that one accidentally unleashed a missile that brought down a heavy into the sea after departure from JFK enr to EU...
Was talking to an investigator of TWA incident two years back, he also saw remains of either KAL 007 or Iran Air (cant remember which ) but he said the damage was exactly the same with both aircraft....