PONCE, Puerto Rico (April 18, 2021) Electronics Technician 2nd Class Corey Krum, assigned to the Freedom-variant littoral combat ship USS Sioux City (LCS 11), tests a Naval Firefighter�s Thermal Imager (NFTI) during a damage control drill while the ship is in port Ponce, Puerto Rico for a planned maintenance availability (PMAV),�April 18, 2021.�Sioux City is deployed to the U.S. 4th Fleet area of operations to support Joint Interagency Task Force South�s mission, which includes counter-illicit drug trafficking missions in the Caribbean and Eastern Pacific. (U.S. Navy photo by Mass Communication Specialist 2nd Class Marianne Guemo)