ATLANTIC OCEAN (Oct. 23, 2021) Sailors assigned to the 22nd Marine Expeditionary Unit underway with the San Antonio-class amphibious transport dock ship USS Arlington (LPD 24), triage a victim in Arlington�s medical facilities during a mass casualty drill, Oct. 23, 2021. Arlington is underway in the Atlantic Ocean to support Amphibious Squadron and Marine Expeditionary Unit Integration (PMINT). PMINT is an opportunity to train for amphibious and maritime operations with embarked Marines in an integrated environment. (U.S. Navy photo by Mass Communication Specialist 2nd Class John Bellino)