Chief Master Sgt. Leonard Howard, 622nd Civil Engineer Group expeditionary combat support training and certification center commandant, speaks to guests of the ECS-TCC military and industry tractor trailer training program capstone event at Dobbins Air Reserve Base, Ga. Jan. 23, 2015. Students who go through the course at Dobbins receive certification from the Professional Truck Drivers Institute. (U.S. Air Force photo/Senior Airman Daniel Phelps)