U.S. Air Force Staff Sgt. Daniel Rivera, 1st Maintenance Group maintenance training instructor, demonstrates steps Airmen must follow during a hot pit refueling class at Joint Base Langley-Eustis, Va., Sept. 13, 2016. Airmen with the 1st MXG attend between one and six courses through the training section each year, depending on their job requirements. (U.S. Air Force photo by Staff Sgt. Teresa J. Cleveland)