one that took the missile theory and added layers of seemingly impossible intrigue. it was a theory of how a navy ship accidently shot down flight 800 and how a cover-up reaching the highest levels of government was in play. and it might have stayed simply an internet conspiracy theory had it not been for this man. >> it's a document i got about five weeks ago from an intelligence agent in france, who had been doing an inquiry and had some contacts with people in the u.s. navy. >> reporter: it was pierre sallinger, who died in 2004. he claimed to have official proof that a navy missile shot down twa 800, naming this ship, the "uss normandy."