Staff Sgt. Billy Stewart, 2nd Maintenance Squadron crew chief, tightens screws on the GBU-31/V3 missile before it is used in the weapons systems evaluation program, at Barksdale Air Force Base, Louisiana, Aug. 17, 2021. The missiles were scheduled to be used during the weapons systems evaluation program live fire demonstration at the end of August 2021 in Utah. (U.S. Air Force photo by Senior Airman Jovante Johnson)