Well I'm going to post my opinion and hope no one attacks it.
OK, I do not think this was an accident at all, though I highly doubt that it was a shoulder launched missile. Surely someone would have seen THAT.
Also, the plane reporetedly started breaking up as soon as it took off, and only was able to stay airborne for 3 minutes.
Now, a plane doesn't just "start falling apart", there has to be a cause. There was no adverse weather that day, nothing really dangerous, an a bird?? Give me a break a bird couldn't cause that much damage.
In fact if what I hear if correct, just before the engines caught fire, the vertical stabilizer (the tail) fell off. Hmmmm....I would consider that kind of strange, wouldn't you?? Considering that the aircraft had a maintenance check just the day before.
Personally I believe it was foul play, and I believe one of two things might have occured.
1) A bomb.
Despite the current security measures I don't think it would be all that difficult to get a bomb on that plane. Also, considering the terrorists from the 9/11 attacks had been trained to fly in the first place, is it not possible that perhaps someone trained as a baggage handler at JFK could possibly have planted a bomb on that plane? Consider that most witnesses reported seeing "A bright orange flash of light where the wing joins the body of the plane, then the engine fell off"
Hmmmmm. Now isn't that kind of interesting? The witnesses, nearly all of them, report seeing the flash of light not at the engine, but rather coming from the underbelly of the aircraft, right where the wing joins the body. To me that sound like a suitcase bomb. You be the judge.
Again, the terrorists have ways to get on the inside. Perhaps the maintenance check the night before, a mechanic might have sabotaged the plane. Here's where the vertical stabilizer anomaly makes sense. Something doesn't just fall off like that, something needs to be done to loosen it. Perhaps a few "repairs" were done to the aircraft, by a not-so-trustworthy mechanic.
Now, if it was not either of those two things, then the only real mechanical failures I can think of are these:
1) Fuel tank explosion.
Probably the most likely. Considering the probably origination of the explosion, the fuel tank might have explded.
2) Engine explosion.
Again a very likely possibility, but why did it rip off the vertical stabilizer? Why did it take the airplane apart as it did?
3) Catastrophic structural failure.
This is also very likely considering the way the aircraft broke up, but what caused it? The aircraft began breaking up before the engine/fuselage exploded, so this is a possibility, but considering the maintenance check the day before, unlikely unless foul play was involved.
I smell something fishy, and I hope you do too, this just isn't right, and I got a bad feeling in my stomach.
At any rate, I ask for no personaly attacks on my views, this does seem kind of strange, considering all the factors, so I as that no one blows up.