U.S. Air Force Senior Airman Tristian Riley, a medical laboratory technician assigned to the 6th Medical Support Squadron, prepares equipment to perform pregnancy tests April 17, 2018, at MacDill Air Force Base, Fla. In the urinalysis section of the lab, technicians perform many different tests and certify results before they are reported to the appropriate medical personnel in a timely manner. (U.S. Air Force photo by Senior Airman Rito Smith)