In this July 19, 2011 photo, Hank Black, left, holds a sign as he talks with Michael Cangemi after a meeting of the North Texans for 9/11 Truth group at a cafe in Dallas. Nationwide, the skeptics, who... more 
In this July 19, 2011 photo, Hank Black, left, holds a sign as he talks with Michael Cangemi after a meeting of the North Texans for 9/11 Truth group at a cafe in Dallas. Nationwide, the skeptics, who prefer the term "9/11 truth activists" instead of the moniker "truthers," generally have about a dozen beliefs surrounding what happened on that day, although there are some variations on who was responsible for the attacks and why. Among the beliefs: that the World Trade Center buildings could never have collapsed due to fire, that the buildings were brought down by explosives, that there were warnings of the impending attacks from 11 different countries and that fighter jets could have intercepted at least one of the four planes that day. Many believe that there were criminal elements within the government that caused the attacks. (AP Photo/LM Otero) less 
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Associated Press | Photo By LM Otero
Thu, Aug 11, 2011 4:36 AM EDT