Anti-runway penetration bombs are systems involving bombs or bomblets which are designed to disrupt the surface of an airfield runway (or tarmac) and make it unusable for flight operations. One early system was the Matra Durandal, a single 450 lb bomb with rocket booster and two warheads. The device worked by first igniting a large warhead to create a crater, then subsequently using a smaller charge that had penetrated the crater to displace adjacent concrete slabs. The slabs, once displaced, were far harder to deal with than a simple hole that could be patched: the defenders would either have to pulverize the slab (for which tools might not be ready) or take the risk that a protruding slab would flip a landing airframe (quite possible considering the velocities at which a jet aircraft lan
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