Conspiracy theories

One of the questions in the survey regarding the landing on the moon made me think...Do you believe in any conspiracy theories?  I don't believe any one side is right or wrong regarding this matter; it's just personal opinion so lets keep it honest yet friendly.

I've listed a few of the more popular ones below.

Pearl Harbor was allowed to happen:  This theory states that President Roosevelt (FDR) provoked the attack, knew about it in advance and covered up his failure to warn the Hawaiian commanders.  FDR needed the attack to have Hitler declare war, since the public and Congress were overwhelmingly against entering the war in Europe.  It was his backdoor into war.

Apollo Moon Landing: Accusations claim that some or all elements of the Apollo Moon landing were faked by NASA and possibly members of other involved organizations.  Some groups and individuals have advanced alternate historical narratives which tend, to varying degrees, to state that the Apollo Astronauts did not land on the moon, and that NASA created and continues to perpetuate this hoax.

Princess Diana was Murdered by the Royal Family:  In 1997, Princess Diana and Dodi Fayed were killed in a car accident while trying to get away from photographers in Paris.  The scandal surrounding their relationship (Dodi was Muslim while Diana was the mother of the future head of the Church of England) has led many people to speculate that they were actually killed in order to prevent further scandal to the throne of England.  Polls suggest that around a quarter of the UK public, and a majority of people in some Arab countries, believe that there was a plot to murder Diana.

UFO recovered at Roswell:  The Roswell UFO incident involved the recovery of materials near Roswell, New Mexico in 1947.  There are widely divergent views on what actually happened.  The US military maintains that what was recovered was a top secret research balloon that had crashed.  However, hundreds of documents were obtained via Freedom of Information Act requests, as were some apparently leaked by insiders, that came to the conclusions that at least one alien craft had crashed in the Roswell vicinity, that aliens, some possibly still alive, were recovered, and that a massive cover-up of any knowledge of the incident was put in place.

9/11 was planned by the US Government:  Many conspiracy theories have been presented concerning the 9/11 attacks, many of them claiming that President George W. Bush and/or individuals in his administration knew about the attacks beforehand and purposefully allowed them to occur because the attacks would generate public support for militarization, expansion of the police state, and other intrusive foreign and domestic policies by which they would benefit.  A 1990 report from a meeting between Donald Rumsfeld, VP *** Cheney and several other key Bush administration figures stated that "some catastrophic and catalyzing event, like a new Pearl Habor would be needed to budge public opinion in their favor".

These are just a few of the thousands out there.  So what do you think?  Do you think any conspiracy theories are based on truth or do you think there are just way too many 'crazies' out there making stuff up?