Reservists take part in the engines running on/offload event at 22nd Air Force's Aerial Port Roundup at Dobbins ARB in March 2009. Twenty-two aerial port squadrons from around Air Force Reserve Command will represent their units Oct. 25-29 at the Port Dawg Challenge, Dobbins Air Reserve Base, Ga. (U.S. Air Force photo/Staff Sgt. Steve Lewis)