ORLANDO—While the U.S. may have woken to the emerging threat of Chinese and Russian hyper velocity weapons, the nation still faces an uphill battle for hypersonic supremacy, warns Michael Griffin, the Pentagon’s new undersecretary of defense for research and engineering. Citing technical hurdles, infrastructure neglect and the legacy of “taking a decade-long holiday from the exigencies of great power competition”, Griffin says the tally of critical challenges ...


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