180627-N-BW951-1212 WAHIAWA, Hawaii (June 27, 2018) Two MH-60s Sea Hawk helicopters attached to Helicopter Sea Combat Squadron FOUR (HSC-4) participate in fast rope insertion and extraction system training between U.S and partner nations during Rim of the Pacific (RIMPAC). Twenty-five nations, more than 45 ships and 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 on the world's oceans. RIMPAC 2018 is the 26th exercise in the series that began in 1971. (U.S. Navy photo by Chief Mass Communication Specialist Cynthia Z. De Leon/Released)