190205-N-HV059-1119 WILLIAMSBURG, Va. (Feb. 5, 2019) Members of the York-Poquoson Sheriff's Office Emergency Response Team prepare to enter a building during an active shooter drill at Naval Weapons Station Yorktown and Cheatham Annex as part of Citadel Shield/Solid Curtain (CS/SC) 2019. CS/SC19 is a two-part anti-terrorism force protection exercise that is being conducted nationwide on installations, Feb 4-15. The annual exercise is not in response to any specific threat, but is used to evaluate the readiness and effectiveness of fleet and installation security programs. (U.S. Navy photo by Mass Communication Specialist 2nd Class Sonja Wickard/Released)