Sgt. Matthew Dungan, center right, a native of Lebanon, Missouri, assigned to Marine Wing Support Squadron 271, monitors members of MWSS 271 and Navy Cargo Handling Battalion 1 testing fuel during a fixed wing refueling operation as part of exercise Northern Viking 22 on Keflavik Air Base, Iceland, April 4, 2022. Northern Viking 22 strengthens interoperability and force readiness between U.S., Iceland and Allied nations, enabling multi-domain command and control of joint and coalition in the defense of Iceland and Sea Lines of Communication in the Greenland, Iceland, United Kingdom gap. - Sgt. Matthew Dungan, center right, a native of Lebanon, Missouri, assigned to Marine Wing Support Squadron 271, monitors members of MWSS 271 and Navy Cargo Handling Battalion 1 testing fuel during a fixed wing refueling operation as part of exercise Northern Viking 22 on Keflavik Air Base, Iceland, April 4, 2022. Northern Viking 22 strengthens interoperability and force readiness between U.S., Iceland and Allied nations, enabling multi-domain command and control of joint and coalition in the defense of Iceland and Sea Lines of Communication in the Greenland, Iceland, United Kingdom gap.