Capt. Ryan Kerns, an instructor pilot assigned to the 34th Bomb Squadron, gives a mission brief before aircrew members depart from Ellsworth Air Force Base, S.D., for the Green Flag exercise 18-1 on Oct. 18, 2017. Aircrew members will be flying in air-to-ground missions for U.S. Army units on the ground. Green Flag exercises focuses on close-air support training which is different from Red Flag exercises which focus on air-to-air combat missions. (U.S. Air Force photo by Airman 1st Class Thomas Karol)