Studies such as "Belief in Conspiracy Theories" state that conspiracy theories relating to the assassination of JFK, the moon landing and the September 11th attacks are united by a common thread: distrust of the government-endorsed story. This leads the believer to attach other conspiracies as well. Someone with a distrust of the government will likely reject any and all stories or reports directly issued by state agencies or other authorities that are seen as part of the establishment. Thus, any conspiracy will seem more plausible to the conspiracy theorist because this fits with their worldview.