+-25 feet isn't good enough to drop a calling card down the lum of the Air Ministry in downtown Baghdad. That kind of precision needs laser guidance. However, if the impact velocity were great enough a hollow impactor filled with fluid such as rocket fuel or even water would become superheated and cause immense damage below gound, far more so than a solid rod. (It was the missile fuel explosions that caused so much damage to HMS Sheffield and MV Atlantic Conveyor when they were hit with Exocets during the Falklands/Malvinas war, not the missile impacts)

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