HSM 433 Week 3 Role of U.S. Agencies in Counterterrorism Role of U.S. Agencies in Counterterrorism. Select one United States agency from the list below and explain the agencyâ€™s role in counterterrorism operations in the U. S. Agencies to choose from include: ï‚§ National Security Agency (NSA) ï‚§ Department of the Treasury, Department of Homeland Security ï‚§ Department of Energy, Department of State, or Defense Intelligence Agency (DIA) In the essay, explain the function of the agency as it relates to counterterrorism operations inside the United States as well as the tools available to the agency to conduct counterterrorism operations. Also, explain how your selected agency interacts with at least one other agency to perform counterterrorism operations. Briefly describe any Justice Department implications of available counterterrorism tools. Make at least one suggestion for how your selected agency could coordinate with emergency responders to minimize casualties. The paper must be five pages in length and formatted according to APA style. You must use at least three scholarly resources other than the textbook to support your claims and subclaims. Cite your resources in text and on the reference page. For information regarding APA samples and tutorials, visit the Ashford Writing Center, within the Learning Resources tab on the left navigation toolbar, in your online course.