The Bureau of Justice Assistance (BJA) created the State and Local Anti-Terrorism Training (SLATT) Program in 1996. SLATT provides specialized terrorism/extremism orientation, interdiction, investigation, and prevention training to state, local, and tribal law enforcement executives, command personnel, patrol officers, intelligence officers, investigators, analytical personnel, and prosecutors. To date, the program has provided instruction to approximately 142,000 practitioners. To help the U.S. government better understand the nature and value of this training, the RAND Corporation, at the request of the National Institute of Justice and BJA, was awarded a contract to assess various aspects of the SLATT Program; the base year was dedicated to developing and refining the detailed assessment plan and collecting preliminary data, while option years 1 and 2 were dedicated to conducting the assessment. This report presents the results of that assessment. It will be of interest to federal, state, and local enforcement; U.S. Attorney’s Offices; the network of fusion centers and joint terrorism task forces (JTTFs); the U.S. Department of Justice and U.S. Department of Homeland Security; and others involved in homeland security at the local, state, and regional levels.