Liberian sailors depart the Mauritanian navy patrol boat Limam Elhadrami (P601) aboard a Royal Navy rigid-hull inflatable boat March 11, 2013, in Dakar, Senegal, after conducting a boarding drill during exercise Saharan Express 2013. Saharan Express is a counternarcotics and proliferation exercise that is part of Africa Partnership Station West. 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.