title: Francis E. Warren Air Force Base
context: Warren AFB is the oldest continuously active military installation within the Air Force, established in 1867 by the United States Army as Fort David Allen Russell. The facility came under United States Army Air Forces control on 1 June 1947, and United States Air Force (USAF) respectively on 18 September 1947 until now.
question: What is the oldest Air Force base in the U.S.?
answers: Warren AFB