U.S. Marine Corps Sgt. Rush, an improvised explosive device detection dog assigned to Charlie Company, 1st Battalion, 9th Marine Regiment, searches for explosives during a patrol near Patrol Base Boldak in Helmand province, Afghanistan, Jan. 30, 2014.
The patrol was conducted to disrupt enemy activity in the area. (DoD photo by Lance Cpl. Zachery B. Martin/Released). Original public domain image from Flickr