9/11 Truthers

From OAPedia.com

9/11 Truthers are confused, delusional people who believe the September 11th terror attacks were perpetrated by the United States government. Opie and Anthony usually confront these people on their show, such as when producers of the 9/11 documentary Loose Change called in, and once during the Walk Over when truthers approached O&A with their "theories". Anthony gives fact-based explanations to counter their arguments, and Jim Norton also uses common sense to show why their beliefs are wrong. Jimmy believes the truthers are looking to belong to some special group that only they're in the know about, but they're really a bunch of lost little children.