171222-M-CK339-065 U.S. FIFTH FLEET AREA OF OPERATIONS (Dec. 22, 2017) Sailors assigned to the amphibious transport dock ship USS San Diego (LPD 22) and Marines assigned to the embarked 15th Marine Expeditionary Unit (15th MEU) pass boxes during a replenishment at sea. San Diego, with the embarked 15th MEU, is deployed to the U.S. 5th Fleet area of operations in support of maritime security operations to reassure allies and partners and preserve the freedom of navigation and the free flow of commerce in the region. (U.S. Marine Corps photo by Lance Cpl. Jeremy Laboy/Released)