ANNAPOLIS, Md. (Feb. 4, 2022) Security forces personnel respond to a simulated threat during an active shooter training exercise held at the U.S. Naval Academy. The training exercise was completed as part of Citadel Shield-Solid Curtain, which is an annual anti-terrorism and force protection exercise designed to challenge the response and capabilities of Navy security forces. (U.S. Navy photo by Mass Communication Specialist 3rd Class Thomas Bonaparte Jr.)