Two U.S. Air Force B-1B Lancer bombers assigned to the 37th Expeditionary Bomb Squadron, deployed from Ellsworth AFB, South Dakota, fly alongside a Koku Jieitai (Japan Air Self-Defense Force) F-2s over the vicinity of the East China Sea, Oct. 21, 2017. Following the flight with Koku Jieitai the Lancers continued on to participate in a flyover for the 2017 Seoul Aerospace & Defense Exhibition (Seoul ADEX 17) at Seoul Airport, Repubic of Korea. (photo courtesy of Koku Jieitai [Japan Air Self-Defense Force])