Security Studies: Terrorism

At West Point.

From the U.S. Department of State. Reports written for U.S. Congress.

From the University of Maryland
National Consortium for the Study of Terrorism and Responses to Terrorism
An Emeritus Center of Excellence of the U.S. Department of Homeland Security. Information on terrorist attacks dating back to 1970. Select "Individual User".

Pew is a non-partisan "fact tank" that aggregates and analyzes statistics about various issues.

From the University of Maryland at College Park and designated a Center of Excellence by the Department of Homeland Security Science and Technology Directorate. Research, analysis, and policy recommendations.