U.S. Marines with 8th Engineer Support Battalion, 2nd Marine Logistics Group, assigned to Joint Task Force-Southern Border, refuel a 5-gallon jerry can to power equipment used for barrier reinforcement operations along the southern border in Douglas, Ariz., April 20, 2026. U.S. Northern Command is working side-by-side with the Department of Homeland Security and the U.S. Customs and Border Protection within narrowly defined authorities to provide unique military capabilities to protect the territorial integrity of the U.S. southern border. (Dept. of War photo by Cpl. Alan Gomez)