Marine Corps Lance Cpl. Matthew Daily ducks after dropping a round into an M252 81 mm medium weight mortar system during Northern Viper 2017 in Chitose, Japan, Aug. 13, 2017. Marines with 1st Battalion, 3rd Marine Regiment and 3rd Light Armored Reconnaissance Battalion spent the day sharing techniques with Japan Ground Self-Defense Force troops. Marine Corps photo by Sgt. Ally Beiswanger