3T course
John Duke, Professional Truck Driver Institutes board of directors member, speaks to members of Dobbins Air Force Base, Ga. on the significance of the tractor trailer program and its Professional Truck Driver Institutes certification Jan. 23, 2015. PTDI certification will allow for graduates to have a more seamless transition from military to civilian employment. (U.S. Air Force photo/Senior Airman Daniel Phelps)
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Senior Airman Daniel
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