Check out this three part series from the BBC from 2004, The Power of Nightmares, then try to imagine PBS doing anything similar. The series calls bullshit on any number of myths that most Americans to this day believe, including the number one myth that there is or ever was an organization called al-Qaeda.
UPDATE: About the same time the BBC was producing Nightmares, Money Public Radio was interviewing the Prince of Darkness himself, Richard Perle. The resulting conversation is a demonstration of much that is wrong with MPR and public broadcasting in this country. While the British were getting insightful, historical, fact-based reporting, Minnesotans were getting propaganda garbage from a known liar and probably a traitor, told to a credulous news reader, Kate Smith. In fairness to Smith, it should be pointed out that Perle is a Straussian liar. For some reason the Brits knew that but she didn't.