U.S. Sailors with Naval Special Warfare Group 10, Nigerian sailors with the Special Boat Service, Cameroonian soldiers with the Rapid Intervention Battalion and Dutch marines with the Maritime Special Operations Forces practice clearing the mission bay aboard the joint high speed vessel USNS Spearhead (JHSV 1) in the Gulf of Guinea, April 21, 2014, during Obangame Express 2014. Obangame Express is a maritime exercise conducted by U.S. Naval Forces Africa to improve cooperation among African partner nations in order to increase safety and security in the Gulf of Guinea. (U.S. Navy photo by Mass Communication Specialist Seaman Justin R. DiNiro/Released)