The only conspiracy theory worth commenting on concerns Ustica (Moderators: can't you find a separate home for TWA800 conspiracy theorists?). The Itavia DC-9 was, as near as could be scientifically determined, broke up in flight after a bomb blew up in the toilet. That was the near-certain conclusion (near only because he is an appropriately conservative investigator) of Frank Taylor, recently retired head of Cranfield Aviation Safety Institute in a highly detailed report several years ago commissioned by the Italian investigating magistrates and published in a past issue of the journal of the International Society of Air Safety Investigators.