States Marines and family members. The base is detailed for Marine pilot training and air patrol, using F/A-18 Hornet fighter-attack aircraft among others in compliance with the Treaty of Mutual Cooperation and Security obligations to protect Japan. MCAS Iwakuni is also shared with the Japanese Maritime Self Defense Force. MCAS Iwakuni is home to a Department of Defense school, Matthew C. Perry (Elementary, Middle School and High School). A new off-shore runway opened at the base on 30 May 2010. The new runway is 2,440 meters in length. On 22 November 2017, a C-2A Greyhound cargo plane with 11 crew and passengers aboard crashed southeast of Okinawa after departing the base for the aircraft carrier USS Ronald Reagan. Eight of the 11 were rescued. On 6 December 2018, an F/A-18D Hornet (callsign "Profane 12") belonging to VMFA(AW)-242 collided mid air with a KC-130 (callsign "Sumo 41") from VMGR-152 during a nighttime training exercise. The crew of Sumo 41 were killed in the collision along with the pilot of Profane 12. The co-pilot of Profane 12 was rescued by JMSDF Search & Rescue in Japanese waters. An investigation into the accident was led by the Marine Corps. ProPublica later conducted their own independent investigation after finding the Marine Corps initial results to be inaccurate. USN Carrier Air Wing 5 relocation to MCAS Iwakuni Since at least 2005 there had been plans to relocate Carrier Air Wing Five's fixed wing aircraft from Naval Air Facility Atsugi in Kanagawa Prefecture to Iwakuni. Yamaguchi governor Sekinari Nii said there was "no way" Yamaguchi prefecture would accept this. In 2006 Iwakuni voters rejected the plan in a plebiscite and Iwakuni mayor Katsusuke Ihara urged Tokyo to drop the plan. In 2007 the Japanese government passed legislation to prepare for the relocation of US Forces in Japan including subsidies for local affected areas. The move was planned to have been done in 2014, but after construction delays the move was delayed by three years, to 2017. The move did not include the wing's two helicopter squadrons. The first CVW-5 squadron, VAW-125 flying the E-2D Hawkeye arrived in January 2017. The Boeing E/A-18G Growlers of VAQ-141 "Shadowhawks" completed relocation in January, 2018. By March 2018, all fixed wing aircraft of Carrier Air Wing 5 had completed relocation from NAF Atsugi. USMC F-35B aircraft The first aircraft of Marine Fighter Attack Squadron 121 "Green Knights" (VMFA-121) arrived on