Radiation effects in physics, chemistry and biology

The National Security Archive at George Washington University presents a collection of government documents related to the terrorist attacks on the United States on September 11, 2001. The documents include assessments of the terrorist threat, a Central Intelligence Agency (CIA) profile of Saudi exile Usama bin Ladin, presidential and Defense Department policy directives, details about the U.S. response to specific terrorist attacks, and evaluations of U.S. government preparedness to deal with terrorism.