Ever since Russian president Vladimir Putin announced last year that his country had successfully tested a hypersonic weapon, the Pentagon has been growing its investment in such technology. Hypersonic munitions are being developed for the Air Force, the Army and the Navy. However, relatively little money is being devoted to defending against hypersonic threats. That is a serious oversight, because current anti-ballistic defenses will need to be modified to cope with boost-glide weapons that do not have a fixed trajectory. The Missile Defense Agency says it also needs a “space sensor layer” that can track hypersonic threats from birth to death. I have written a commentary for Forbes here.
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