"In the post-9/11 era, first responders have incorporated protecting the Homeland against terrorism into their daily mission. Law enforcement, fire service, and emergency medical services personnel play a vital role in detecting and preventing attacks because of the nature of their work, their frequent interaction with members of the public, and the level of access their jobs provide. People who hold these jobs often can identify behaviors or activities that could signal a pending terrorist attack; therefore, public safety personnel must continue to report, according to the Nationwide Suspicious Activity Reporting Initiative, observations that raise reasonable suspicion. The Intelligence Community routinely produces information for public safety personnel that may help first responders identify terrorist-related activities and prevent, deter, or respond to terrorist attacks. You can obtain this information through existing joint partnerships and from Internet-based U.S. Government information-sharing systems. It is critical that first responders, who are entrusted with keeping our citizens safe, be able to access, understand, and use this information. The Joint Counterterrorism Assessment Team (JCAT) Intelligence Guide for First Responders was produced by first responders for first responders and was designed to improve information sharing among state, local, tribal, and territorial jurisdictions and the federal government."
Office of the Director of National Intelligence: https://www.dni.gov/