The 28th Bomb Wing’s first B-1 bomber upgraded with Sustainment Block-16 touches down at Ellsworth Air Force Base, S.D., May 2, 2016. With the upgraded B-1’s return from Tinker Air Force Base, Oklahoma, Ellsworth Airmen will be able to put their training from the IBS-updated sim to the test. (U.S. Air Force photo by Airman Donald Knechtel/Released)