Jeffrey Bruns, 60th Maintenance Squadron sheet metal section chief, assembles a face shield prototype March 31, 2020, at Travis Air Force Base, Calif. The 60th Air Mobility Wing Phoenix Spark innovation cell, 60th MXS and 60th Bioenvironmental Engineer Squadron collaborated to come up with easy-to-manufacture PPE for David Grant U.S. Air Force Medical Center personnel. (U.S. Air Force photo by Tech. Sgt. Traci Keller)