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U.S.-Japan GPI Workshare Revealed: Northrop Details 50-50 Split in Hypersonic Interceptor Program

Summary by Naval News
Northrop Grumman has publicly detailed, for the first time, how work is divided between the United States and Japan in the co-development of the Glide Phase Interceptor (GPI), a next-generation missile designed to defeat hypersonic threats.
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Naval News broke the news on Thursday, April 23, 2026.
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