U.S. Air Force Staff Sgt. Justin Shields, 34th Expeditionary Aircraft Maintenance Unit crew chief, marshals a B-1B Lancer into a parking spot at Osan Air Base, Republic of Korea, Sept. 21, 2016. The B-1 had just conducted its closest flight to the North Korean border ever, as well as landing on the Korean Peninsula for the first time since 1996. The B-1 is deployed from Andersen Air Base, Guam. (U.S. Air Force photo by Senior Airman Victor J. Caputo)