The Great Conspiracy, by Canadian Journalist Barrie Zwicker.

This documentary takes a long view in presenting the case for U.S. Government complicity in the 9/11 attacks, citing historical precedents such as Operation Northwoods, the Gulf of Tonkin incident and the Reichstag fire of 1933.

This documentary is in Google Video format, which is currently in beta release. It may not play consistently in all browsers.