Iwakuni City firefighters respond to a fire during

Iwakuni City firefighters respond to a fire during an annual first-responder mass casualty drill at Atago Hills in Iwakuni City, Japan, Feb. 13, 2018.The Mass-Casualty Mutual-Aid bilateral exercise increases interoperability through the rehearsal of bilateral communication plans and tactics, techniques and procedures among first responders and emergency operations centers during any mass-casualty scenario occurring off the main installation. This day-long training exercise is an example of Marine Corps Air Station Iwakuni’s dedication to mission readiness, realistic training and ability to interoperate with Iwakuni City and other Japanese first responders. (U.S. Marine Corps photo by Cpl. James Guillory)