191224-N-LZ839-1138 ATLANTIC OCEAN (Dec. 24, 2019) Sailors participate in a toxic gas drill aboard the amphibious assault ship USS Bataan (LHD 5), Dec. 24, 2019. Bataan is operating in the Atlantic Ocean in support of naval operations to maintain maritime stability and security in order to ensure access, deter aggression and defend U.S., allied and partner interests. (U.S. Navy photo by Mass Communication Specialist Seaman Apprentice Darren Newell/Released)