An Airman from the Puerto Rico Air National Guard’s 156th Contingency Response Group marshals a C-130 Hercules aircraft using night-vision equipment at Muñiz Air National Guard Base in Carolina, Puerto Rico, on June 15, 2021, as part of Maintenance University. More than 130 Airmen from the Kentucky Air Guard’s 123rd Airlift Wing trained on career-specific proficiencies during the intensive course, joining with members of the Puerto Rico Air Guard for night-vision training. (U.S. Air National Guard photo by Staff Sgt. Clayton Wear)