Lt. Gen. Chris Nowland, 12th Air Force commander, addresses Airmen during and all call at Ellsworth Air Force Base, S.D., April 8. 2015. During his speech, Nowland covered operational and cultural excellence, mission accomplishment and execution, as well as the importance of taking care of fellow Airmen. (U.S. Air Force photo by Airman 1st Class Rebecca Imwalle/Released)