A mosquito clings to the wall of an incubation jar as the larva swim below; they were collected as part of the mosquito surveillance program at Fort Bliss, Texas, to prevent the spread of West Nile virus, Oct. 10. Adult insects are shipped to U.S. Army Public Health Command Region - North to test for transmittable diseases. (Photo by U.S. Army Sgt. Jonathan W. Thomas, 16th Mobile Public Affairs Detachment)