United 93 September 11 Question?

I can't remember where I heard it but do I remember a reporter or someone on TV saying that they did bring down WTC7 in a controlled demolition but it was because the foundations had been weakened and it was going to fall anyway. I do love a good conspiracy theory so the standout fact for me is more than 25 times the normal Put trades (bets that the stock would fall) were placed against American and United Airlines shortly before the attack and both stocks dropped around 40% but then again if you were the mastermind of the attacks and had the money to play the market you would get on it too.