A simulated improvised explosive is hidden on the side of a trail during training, Jan. 24, 2018, at Moody Air Force Base, Ga. The 820th Base Defense Group defenders trained on how to detect IEDs and counter measures to take when one is found. IEDs have become one of the most common forms of attack in the Middle East since 2003. (U.S. Air Force photos by Staff Sgt. Eric Summers Jr.)