Roll-on/roll-off Modular Aerial Spray System holds the insecticide that was being sprayed over Homestead Air Reserve Base, Fla., on July 31. The insecticide spray ratio is half a shot glass per football field, which is enough to kill flying mosquitos but it will not harm people or pets. (U.S. Air Force photo by/Senior Airman Jaimi L. Upthegrove)