150424-N-SD120-004 OKINAWA, Japan (April 24, 2015) Builder Justin Keene, a Seabee assigned to Naval Mobile Construction Battalion (NMCB) 5, rappels down a steep cliff at Jungle Warfare Training Center in Okinawa. More than 60 Seabees from NMCB-5 attended the week long course taught by Marine instructors. The course is designed to prepare Marines and joint forces for the rigors of combat in a dense jungle environment. NMCB-5 is currently deployed to Japan and several countries in the Pacific area of operations conducting construction operations and humanitarian assistance projects. (U.S. Navy photo by Mass Communication Specialist 1st Class John P. Curtis/Released)