DoD Knowledge Base: FAQs
Many tips and information received by legitimate sources have led to the arrests of terrorists. Although the Defense Department has a major role to play in the war on terrorism, we are not a domestic law enforcement agency, so we ask that you provide your information to the appropriate authorities, as shown below:
The FBI has an Internet link for submitting a terrorist tip. Please see: https://tips.fbi.gov/
The Department of Homeland Security web site also provides information on how to report suspicious activity at:
http://www.dhs.gov/how-do-i/report-suspicious-activity and http://www.us-cert.gov/.