U.S. Air Force Staff Sgt. Daniel Rivera, 1st Maintenance Group maintenance training instructor, demonstrates the proper procedures for hot pit refueling for Airmen involved in each part of the process during a training class at Joint Base Langley-Eustis, Va., Sept. 13, 2016. The maintenance training section instructors teach approximately 190 courses each year to Airmen from the 1st MXG and the 192nd Maintenance Group. (U.S. Air Force photo by Staff Sgt. Teresa J. Cleveland)