200205-N-AM903-2018 BETHESDA, Maryland (Feb. 5, 2020) Master-at-Arms 2nd Class Nicholas Wassel, right, apprehends a gate runner at Naval Support Activity Bethesda's Gate 5 while an exercise observer looks on during an improvised explosive device drill as part of Citadel Shield-Solid Curtain 2020. CS-SC is a two-part, anti-terrorism force protection exercise being conducted on installations nationwide, Feb. 3-14. The annual exercise is not in response to any specific threat, but is used to evaluate the readiness of the fleet and installation security programs. (U.S. Navy photo by Mass Communication Specialist 2nd Class Julio Martinez Martinez/Released)