180418-N-RI884-0657 PHILIPPINE SEA (April 18, 2018) An F-35B Lightning II assigned to Marine Fighter Attack Squadron (VFMA) 121 approaches the amphibious assault ship USS Wasp (LHD 1) following an expeditionary strike exercise as part of a certification exercise (CERTEX). CERTEX is the final evaluation in a series of training exercises which ensures readiness for crisis response throughout the Indo-Pacific region. (U.S. Navy photo by Mass Communication Specialist 1st Class Daniel Barker/Released)