Maj. Gen. Hoo Cher Mou, Chief of the Republic of Singapore Air Force, and his wife Julie enter a 1st Helicopter Squadron UH-1N helicopter at Joint Base Andrews, Md., Oct. 20, 2014. Mou 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)