Tech. Sgt. Bob Medlock, assigned to 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 60K loader through an obstacle course on the flightline here Oct. 3, 2010. The course was part of a class meant to reinforce safe operational practices. The loader is named after the late Lt. Gen. William H. Tunner, a former commander of U.S. Air Forces in Europe.(U.S. Air Force Photo/Tech. Sgt. Drew Nystrom)