Dr. Nina Griffin, a veterinarian assigned to the Public Health Command-Fort Eustis Branch, performs as Heartworm test during an exam at Langley Air Force Base, Va., March 18, 2016. The Langley Veterinary Clinic offers parasite testing and offers a fully stocked pharmacy for a wide variety of prescriptions their patients may need. (U.S. Air Force photo by Senior Airman Brittany E. N. Murphy)