U.S. Air Force Tech. Sgt. Kenneth Oliver, the noncommissioned officer in charge of occupational safety assigned to the 97th Air Mobility Wing, puts up a warning sign in a room that will be cleaned by a LightStrike Germ-Zapping Robot, April 2, 2020, at Altus Air Force Base, Okla. The robot will be shared base-wide as an additional tool to prevent the potential spread of diseases. (U.S. Air Force photo by Staff Sgt. Cody Dowell)