Master-at-Arms 3rd Class Caitlin Barto, from Boston,

Master-at-Arms 3rd Class Caitlin Barto, from Boston, studies for her patrolman's board on the mess deck aboard the Nimitz-class aircraft carrier USS Carl Vinson (CVN 70). Carl Vinson and its embarked air wing, Carrier Air Wing (CVW) 17, are on deployment in the 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 2nd Class Scott Fenaroli/Released)