Worried About Russian And Chinese Hypersonic Weapons? DARPA Isn't

Michael Peck

Key Point: The Achilles heel of ballistic missile defense has been that it's cheaper for an attacker to build an overwhelming mass of missiles and warheads than it is for the defender to build interceptors to stop them.

DARPA calls it "counter-hypersonics."

The rest of us would call it a way -- or a prayer -- to stop nuclear warheads coming down on our heads at 20 times the speed of sound.

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