Furthermore, that was the way it turned out. At every level in one’s progress up that staggeringly high pyramid, the world was once more divided into those men who had the right stuff to continue the climb and those who had to be left behind in the most obvious way. Some were eliminated in the course of the opening classroom work, as either not smart enough or not hardworking enough, and were left behind. Then came the basic flight instruction, in single-engine, propeller-driven trainers, and a few more—even though the military tried to make this stage easy—were washed out and left behind.
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