Air Force Brig. Gen. Bill Cooley listens as Deputy Defense Secretary Bob Work addresses participants of the U.S. Air Force's 2015 Senior Leader Orientation Course on Joint Base Andrews, Md., July 17, 2015. Air Force Brig. Gen. Bill Cooley listens as Deputy Defense Secretary Bob Work addresses participants of the U.S. Air Force's 2015 Senior Leader Orientation Course on Joint Base Andrews, Md., July 17, 2015. SHARE: Download: Full Size (1.801193 MB) Tags: Photo Essays Credit: VIRIN: 687765-T-JGA88-465.jpg Photo Gallery