U.S. Air Force Staff Sgt. Lucretia Cunningham, an allergy and immunization technician assigned to the 633rd Medical Operations Squadron, prepares a patient for an allergy skin test at Langley Air Force Base, Va., May 12, 2016. Along with skin testing, the allergy and immunization clinic offers asthma, venom and medication testing. (U.S. Air Force photo by Airman 1st Class Kaylee Dubois)