180709-N-VR594-1063 JOINT BASE PEARL HARBOR-HICKAM, Hawaii (July 9, 2018) Navy Diver 1st Class Jack Dalziel, assigned to Mobile Diving Salvage Unit (MDSU) 1, from Chicago, assists Navy Diver 2nd Class Andres Suero, assigned to MDSU-1, from Carolina, Puerto Rico, with his diving helmet after conducting underwater welding operations at Joint Base Pearl Harbor-Hickam during Rim of the Pacific (RIMPAC) exercise, July 9, 2018. Twenty-five nations, 46 ships, five submarines, about 200 aircraft, and 25,000 personnel are participating in RIMPAC from June 27 to Aug. 2 in and around the Hawaiian Islands and Southern California. The world’s largest international maritime exercise, RIMPAC provides a unique training opportunity while fostering and sustaining cooperative relationships among participants critical to ensuring the safety of sea lanes and security of the world’s oceans. RIMPAC 2018 is the 26th exercise in the series that began in 1971 (U.S. Navy photo by Mass Communication Specialist 2nd Class Kelsey J. Hockenberger/Released)