Raymond Randle, environmental health technician, Fort Bliss Environmental Health, connects a mosquito trap to a carbon dioxide source during his daily rounds as part of the mosquito surveillance program at Fort Bliss, Texas, to prevent the spread of West Nile virus, Oct. 10. The carbon dioxide attracts the mosquito and the net prevents them from escaping. (Photo by U.S. Army Sgt. Jonathan W. Thomas, 16th Mobile Public Affairs Detachment)