Transport: Balloon Apron

As vexed by bombers as a horse by flies, London during the World War finally tried a preventive worthy of Jules Verne—a "balloon apron" of gas bags tethered on the outskirts of the city by 10,000-ft. cables. From them dangled a curtain of cables in which enemy planes were supposed to tangle like flies in a spider's web. Only one German plane hit the barrage, smashed through, escaped. Yet fear of the apron did force the attackers higher, thus impairing their marksmanship. This year, therefore, in its frenzy of rearmament, Great Britain is again preparing a balloon apron to be used...

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