Members of the Republic of Singapore Air Force and the U.S. Air Force pose for a photo after an aerial tour of Washington, D.C. Maj. Gen. Hoo Cher Mou, center, Chief of the Republic of Singapore Air Force, is visiting U.S. Air Force key programs and receiving briefings from Air Force leaders as a mean to strengthen the coalition relationship. (U.S. Air Force photo/Airman 1st Class Ryan J. Sonnier)