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U.S. Naval Research Laboratory Principal Investigator Kevin Cronin (left) and U.S. Marine Corps Expeditionary Energy Office Science and Technology Analyst Capt. Joshua Ashley (right) train Marines with Combat Logistics Company 33 on the warfighting utility of hydrogen fuel cell systems during an exercise at Marine Corps Training Area Bellows, Hawaii, March 4, 2024. - U.S. Naval Research Laboratory Principal Investigator Kevin Cronin (left) and U.S. Marine Corps Expeditionary Energy Office Science and Technology Analyst Capt. Joshua Ashley (right) train Marines with Combat Logistics Company 33 on the warfighting utility of hydrogen fuel cell systems during an exercise at Marine Corps Training Area Bellows, Hawaii, March 4, 2024.

U.S. Naval Research Laboratory Principal Investigator Kevin Cronin (left) and U.S. Marine Corps Expeditionary Energy Office Science and Technology Analyst Capt. Joshua Ashley (right) train Marines with Combat Logistics Company 33 on the warfighting utility of hydrogen fuel cell systems during an exercise at Marine Corps Training Area Bellows, Hawaii, March 4, 2024. - U.S. Naval Research Laboratory Principal Investigator Kevin Cronin (left) and U.S. Marine Corps Expeditionary Energy Office Science and Technology Analyst Capt. Joshua Ashley (right) train Marines with Combat Logistics Company 33 on the warfighting utility of hydrogen fuel cell systems during an exercise at Marine Corps Training Area Bellows, Hawaii, March 4, 2024.