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Royal Australian Air Force Air Commodore Darren Boldie, Director General Air Combat Capability, flies in an F-35 simulator during the Pacific F-35 Users Group Conference at Joint Base Pearl Harbor-Hickam, Hawaii, March 12, 2019. F-35 subject matter experts from the United States, Australia, Japan and the Republic of Korea met to increase 5th and 4th generation aircraft theater interoperability. More than 80 personnel from the four nations discussed bed down and strategic concepts, operations, logistics, and sustainment topics, all building on the success of the March 2017 F-35 Symposium.