Republic of Singapore Air Force Lt. Gen. Ng Chee Meng, Chief of Defense Force, is greeted by U.S. Army Lt. Gen. Kevin Mangum, Training and Doctrine Command chief of staff, at Langley Air Force Base, Va., Aug. 20, 2014. During his visit, NG toured the Training Brain Operations Center and the 480th Intelligence Surveillance Reconnaissance Wing. (U.S. Air Force photo by Senior Airman Kayla Newman/Released)

Republic of Singapore Air Force Lt. Gen. Ng Chee Meng, Chief of Defense Force, asks questions during a briefing at the Training Brain Operations Center in Newport News, Va., Aug. 20, 2014. Along with the briefing, Ng toured the TBOC facility and spoke with several individuals about their mission and contributions to the U.S. Army. (U.S. Air Force photo by Senior Airman Kayla Newman/Released)

Republic of Singapore Air Force Lt. Gen. Ng Chee Meng, Chief of Defense Force, receives a briefing during a tour of the 480th Intelligence Surveillance Reconnaissance Wing at Langley Air Force Base, Va., Aug. 20, 2014. The tour provided agencies at Joint Base Langley-Eustis, Va., an opportunity to strengthen bonds between the U.S. military and Singapore. (U.S. Air Force photo by Senior Airman Kayla Newman/Released)

Republic of Singapore Air Force Lt. Gen. Ng Chee Meng, Chief of Defense Force, attends a briefing from the 480th Intelligence Surveillance Reconnaissance Wing commander at Langley Air Force Base, Va., Aug. 20, 2014. Ng’s visit included a tour of the 480th ISR operations floor, as well as a tour of the Training Brain Operations Center in Newport News, Va. (U.S. Air Force photo by Senior Airman Kayla Newman/Released)