The U.S. is stepping up work on defending against hypersonic missile even as its pursues several, seemingly competing high-speed strike weapon programs. Defense editor Steve Trimble and senior editor Guy Norris, talking with technology editor Graham Warwick, dig deep into what we do and don’t know about what the Pentagon is up to in the rapidly evolving field of offensive and defensive hypersonics.

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As offensive weapon development continues, the Pentagon ramps up hypersonic defense activity.

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