U.S. Marines with Task Force Southwest 18.1 halt briefly

U.S. Marines with Task Force Southwest 18.1 halt briefly during a night security patrol near Bost Airfield, Afghanistan, Jan. 17, 2018. The patrol helped to enhance security around Bost and to assist the Afghan National Defense and Security Force’s capabilities in Helmand province, allowing the ANDSF to maintain a high operational tempo with near constant operations around the province. (U.S. Marine Corps photo by Sgt. Sean J. Berry)