Occam's Razor applies as always. Simply put, if there are multiple explanations for the same phenomenon/event then the simplest of the lot is generally the "truth". This is why vast and complicate conspiracy theories do not hold up under careful scrutiny... Some crazies stole some jets and rammed them into some stuff. Sounds pretty simple to me.
However.... the Obama administration is certainly to blame for this horrendous flat spell. Just give a few hours of your time for me to outline my reasoning and direct you to a couple of dozen shaky YouTube videos. What more proof would anyone need!!
Check out who visited the whitehouse the day after and Condoleezza's reaction when asked about it at a press conference. I watched an interesting documentary called 911, a search for truth. It was mostly about family members of victims and their questions that werent answered. It was on Link TV. You can get it on Dish or Direct. No cable. Good stuff.