PEARL HARBOR (Feb. 23, 2011) Sailors aboard the guided-missile destroyer USS Hopper (DDG 70) operate the forward gun mount during a Solid Curtain-Citadel Shield 2011 training exercise. The weeklong series of anti-terrorism and force protection exercises involves Navy installations and activities in the continental United States, Hawaii and Guam. (U.S. Navy photo by Mass Communication Specialist 2nd Class Mark Logico/Released)
