On September 21, the National Security Archive (NSA) posted the first volume in their new series The September 11th Source Books. The series aims to fulfill NSA's mission "to put on the record the primary source documentation that can enrich the policy debate, improve journalism, educate policymakers, and ensure that we don't reinvent the wheel or repeat the mistakes of the past." As such, this first volume, Terrorism and U.S. Policy, covers a wide range of primary documents grouped in five main subjects: Terrorism and Usama bin Ladin; Congressional Research Service reports; General Accounting Office reports; Department of Defense Directives, Instructions and statements; and Presidential Directives and Executive Orders. NSA plans future volumes covering Soviet and US documents related to the last war in Afghanistan and specific policy topics such as the US ban on assassinations. Readers can sign up for email notifications of updates to the site.