GRAND FORKS AIR FORCE BASE, N.D. -- Airmen from the 757th Airlift Squadron from Youngstown Air Reserve Station, Ohio, sprayed the base this week using a $6 million spray system in attempts to lower the number of irritations and infections associated with mosquito bites, as well as minimize the threat of West Nile Virus. (U.S. Air Force photo/Airman 1st Class Chad Kellum)