The scenario of mechanical failure is (were I a conspiracy theorist) contains much greater motivation for the government to lie to the American people over. If folks thought found out that the airline had flown an ship that was not airworthy and where maintenance/inspection had not been done correctly, it would devastate American Airline. It would also seriously decrease confidence in the mode of travel. Certainly for those who would fly, most would reject any travel agents offer of an airbus flight.
Lastly, one has to ask why a president with much credibility and trust of the people (at least according to the polls) would run the risk of being exposed as a liar over something like not telling people what they already know - that terrorists are still in the country and not all have been found. Bottom line is it would be in the best interest of this administration for this to turn out to be an act of terror. It would certainly be seen by DEMS as an opportunity for a complete takeover of the airline industry by government.
None of these arguments make any sense to me. None of the speculation without the information makes sense to me. And certainly none of the distrust directed at a president who doesn't have a track record of lying to the American people makes sense to me. If it were Al Gore who were president right now I might buy it because he lied to the American people repeatedly and even believed his own stuff. We don't have a headcase in the Whitehouse right now, so I'm having a difficulty thinking of him as the anti-patriot lying scum that many seem to consider him.