A Youngstown C-130H Hercules aircraft, modified for the Department of Defense's only aerial spray mission, demonstrates its capability by flying low and spraying water through a Modular Aerial Spray System used only for training during the annual aerial spray course here, May 10, 2017. This flight simulates a pesticide mission which can eliminate pest or disease-carrying insects to protect Service members. (U.S. Air Force photo/Master Sgt. Bob Barko Jr.)