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Far above and beyond, rows of dots marked the race of swift scouts for the upper levels. And high in the clear air shone the glittering menace trailing their five plumes of gas. A deeper detonation was merging into the uproar. It came from the ships, Thurston knew, where anti aircraft guns poured a

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efficiency of this practice, in a peri od when time W a S a factor in every action and in an industry which in itself lacked the experience of pro ducing aircraft and aeronautical material in volume, was evident. An intent to use the resources of the Ground School at MIT to de velop qualified inspectors was first


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