The Marines teach you, above all, how to adapt, improvise, and overcome. But they expect you to have done your homework, to have mastered your profession. Amateur performance is anathema, and the Marines are bluntly critical of falling short, satisfied only with 100 percent effort and commitment. Yet over the course of my career, every time I made a mistake—and I made many—the Marines promoted me. They recognized that those mistakes were part of my tuition and a necessary bridge to learning how to do things right. Year in and year out, the Marines had trained me in skills they knew I needed,
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