National Commission on Terrorist Attacks upon the United States: Monograph on Terrorist Financing, Staff Report to the Commission [open pdf - 601KB]
"After the September 11 attacks, the highest-level U.S. government officials publicly declared that the fight against al Qaeda financing was as critical as the fight against al Qaeda itself. It has been presented as one of the keys to success in the fight against terrorism: if we choke off the terrorists' money, we limit their ability to conduct mass casualty attacks. In reality, completely choking off the money to al Qaeda and affiliated terrorist groups has been essentially impossible. At the same time, tracking al Qaeda financing has proven a very effective way to locate terrorist operatives and supporters and to disrupt terrorist plots. This monograph, together with the relevant parts of the Commission's final report, reflects the staff's investigation into al Qaeda financing and the U.S. government's efforts to combat it. This monograph represents the collective efforts of a number of members of the staff."
National Commission on Terrorist Attacks Upon the United States: http://www.9-11commission.gov/