In this Thursday, Oct. 4, 2012 photo, Brittany Mariscal, an entomological technician with the Florida Keys Mosquito Control District, sorts and counts dead captured mosquitoes under a microscope in Key West, Fla. Mosquito control officials in the Florida Keys are waiting for the federal government to sign off on an experiment that would release hundreds of thousands of genetically modified mosquitoes to reduce the risk of dengue fever in this tourist town.
Section:Photo
