U.S. Navy Master-at-Arms Seaman Apprentice Kade LeBlanc of Belton secures a line during a towing evolution as part of a small boat probe and attack drill at Naval Weapons Station Yorktown on Feb. 4. LeBlanc took part in Exercise Citadel Shield-Solid Curtain 2020, a two-part, anti-terrorism force protection exercise being conducted nationwide on Navy installations through Friday. The annual exercise is not in response to any specific threat but is used to evaluate the readiness of fleet and installation security programs.