Airman 1st Class Amanda Joyce, 28th Medical Operations Squadron public health technician, separates male and female mosquitoes at Ellsworth Air Force Base, S.D., Sept. 2, 2014. Since only female mosquitoes bite and spread disease, they are collected and sent to a lab at Wright-Patterson AFB, Ohio, to be analyzed and tested. (U.S. Air Force photo by Senior Airman Anania Tekurio/Released)