Word: outthrust
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Dates: during 1960-1960
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...lying snugly behind their three-mile limits, a tradition established 250 years ago, when three miles was the span of a cannon's shot. In the modern world of atoms, rockets, and planes swifter than sound, the wall of the fortress is invisible. The wall is electronic-an outthrust barrier of radars, direction-seeking radios and - aiming instruments. For both the U.S. and the Soviet Union, it has become vital to spot and plot the ever-shifting shadows and strengths of the adversary's invisible frontier...