A pilot assigned to the 34th Bomb Squadron, Ellsworth Air Force Base, S.D., performs preflight checks on a B-1B Lancer during Red Flag 17-1 on Nellis Air Force Base, Nev., Jan. 27, 2017. Red Flag was established in 1975 as one of the initiatives to better prepare our forces for combat. (U.S. Air Force photo by Airman 1st Class Kevin Tanenbaum/Released)