Tech. Sgt. Robert Medlock (right), air transportation craftsman with the 455th Expedtionary Aerial Port Squadron at Bagram Airfield, Afghanistan, explains safe operating habits and the importance of situational awareness before letting Airmen drive a Tunner 60,000-pound capable loader through an obstacle course on the flightline at Bragram on Oct. 3, 2010. The course was part of a class meant to reinforce safe operational practices. Sergeant Medlock is deployed from the 70th Aerial Port Squadron at Homestead Air Reserve Base, Fla. (U.S. Air Force Photo/Tech. Sgt. Drew Nystrom)