U.K. Prime Minister David Cameron speaks with U.S. Marine Corps Brig. Gen. Daniel D. Yoo, commander of Regional Command (SouthWest) aboard Camp Bastion, Helmand province, Afghanistan, Oct. 3, 2014. Cameron spoke with British troops and met with International Security Assistance Force and Afghan National Army leaders in charge of the region. (Official U.S. Marine Corps photo by Cpl. Darien J. Bjorndal, Marine Expeditionary Brigade Afghanistan/ Released)