Mitchel Burcham, 633rd Civil Engineering Squadron Pest Management technician, looks at mosquito samples through a microscope at Langley Air Force Base, Va., June 18, 2015. After collecting samples from the field, technicians search for disease factors related to the West Nile and Eastern Equine encephalitis viruses. (U.S. Air Force photo by Airman 1st Class Devin S. Michaels/Released)