A role player, left, prepares to throw a bag of sand at U.S. Marines during a riot control exercise led by British marines in Lagos, Nigeria, Oct. 18, 2013, during Africa Partnership Station (APS) 2013. APS is an international security cooperation initiative facilitated by Commander, U.S. Naval Forces Europe-Africa aimed at strengthening global maritime partnerships through training and collaborative activities in order to improve maritime safety and security in Africa.