Lt. j.g. Jermaine D. Jackson, middle, from Houston,

Lt. j.g. Jermaine D. Jackson, middle, from Houston, uses a baton to fend off perpetrators after being sprayed with oleoresin capsicum (OC) spray during a security certification course on the aft missile deck of the Arleigh Burke-class guided-missile destroyer USS Dewey (DDG 105). Dewey is underway as part of the Carl Vinson Carrier Strike Group. Carl Vinson and its embarked air wing, Carrier Air Wing 17, are on deployment in the U.S. 7th Fleet area of operations supporting Valiant Shield. Valiant Shield is a U.S.-only biennial exercise in which participation will focus on the integration of joint training among U.S. forces. (U.S. Navy photo by Mass Communication Specialist 3rd Class James Vazquez/Released)