150306-N-RB579-091 LUANDA, Angola (March 6, 2015) U.S. Army Col. Matthew Sousa, U.S. Embassy defense attaché, briefs Angolan military and civilian personnel about the upcoming maritime interoperability exercise Obangame Express 2015 aboard the Military Sealift Command's joint high-speed vessel USNS Spearhead (JHSV 1), March 6, 2015. Spearhead is on a scheduled deployment to the U.S. 6th Fleet area of operations in support of the international collaborative capacity-building program Africa Partnership Station. (U.S. Navy photo by Mass Communication Specialist 1st Class Joshua Davies/Released)