Two U.S. Air Force B-1B Lancers deployed to Andersen Air Base, Guam, fly over Republic of Korean skies Sept. 21, 2016. The flight was the closest a B-1 has ever flown to the border between the ROK and North Korea. The B-1 is the backbone of the U.S. long-range bomber mission and is capable of carrying the largest payload of both guided and unguided weapons in the Air Force inventory. (Republic of Korea air force photo by Chief Master Sgt. Kim, Kyeong Ryul)