366th Training Squadron explosive ordnance disposal preliminary course students perform team pushups in between ruck marches April 26, 2018. The 26-day course located at Sheppard Air Force Base, Texas, has suffered high attrition rates in the past, but through collaboration with Midwestern State University in Wichita Falls, Texas, they have been able to cut down injuries along with the attrition rates. (U.S. Air Force photo by Senior Airman Robert L. McIlrath)