Col. Bill Knight, 11th Wing/ Joint Base Andrews commander, gives a mission brief to personnel from the Embassy of the Federal Republic of Germany here Oct. 17, 2012. Andrews is home to Air Force District of Washington, the 11th Wing and several partner units on base, including Air Mobility Command's 89th Airlift Wing, the 79th Medical Wing, the Air Force Office of Special Investigation headquarters, Air Force Reserve Command's 459th Air Refueling Wing and D.C. Air National Guard's 113th Wing. (U.S. Air Force photo/ Staff Sgt. Nichelle Anderson)(Released)