Shadd Straw and Garrett Kippen (left to right), 581 Missile Maintenance Squadron powered support system mechanics, wear their protective face coverings while they work to connect hydraulic lines from a test stand to a loading mechanism on Apr. 28, 2020, at Hill Air Force Base, Utah. When in use, the loading mechanism is attached to a 24-inch blast valve used to protect launch crews at missile launch centers. (U.S. Air Force photo by Alex R. Lloyd)