Adds a new section (section 324) to Title III of the Homeland Security Act (6 U.S.C. 231 et seq.) establishing a requirement for the Secretary and the Department to produce classified annual assessments (for six years, beginning with an initial report within 270 days of enactment) on terrorism threats from covered unmanned aircraft systems operated by covered foreign adversaries, including required content, consultations, briefings, and an unclassified public annex.