PACIFIC OCEAN (Aug. 7, 2019) Marines assigned to the 31st Marine Expeditionary Unit (MEU) fire a Light Armored Vehicle (LAV) M242 Bushmaster 25mm chain gun during a Defense of the Amphibious Task Force (DATF) drill aboard the amphibious assault ship USS Wasp (LHD 1), Pacific Ocean, Aug. 7, 2019. During the DATF drill, the Wasp Amphibious Ready Group and 31st MEU team assumed a security posture to simulate traveling through potentially dangerous waters. Wasp, flagship of the Wasp Amphibious Ready Group, with embarked 31st MEU, is operating in the Indo-Pacific region to enhance interoperability with partners and serve as ready-response force for any type of contingency, while simultaneously providing a flexible and lethal crisis response force ready to perform a wide range of military operations. (U.S. Navy photo by Mass Communication Specialist 1st Class Jeremy Starr)