Raytheon has tested a two-stage warhead concept designed to punch through 35ft (11m) of granite or 20ft of high-pressure concrete to penetrate cave complexes or hardened and buried bunkers.
The tandem warhead is designed for use against targets that other conventional weapons cannot penetrate, says vice-president strike weapons Harry Schulte, adding: "We think this is the biggest ever made."
In the two-stage concept, a shaped-charge precursor warhead is triggered a short distance from the target, forming a 10km/s jet of molten metal that drills through the rock or concrete, turning it to rubble. This clears the way for a follow-on warhead to penetrate the cave or bunker and explode.
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