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Since America’s infancy, metric missionaries have been frustrated by our steadfast resistance to being converted. They’ve blamed public ignorance, apathy and stubbornness, unenlightened industry, meager government funding, and more. But beneath the surface, our enduring allegiance to the U.S. Customary System of Weights and Measures is rooted in a commonsense, even if largely intuitive, preference for this finely honed system of inches, pounds, quarts, and degrees Fahrenheit. So long as Americans defend their freedom, the measurement issue will never be decided in a government office. It will be settled at the Home Depot checkout counter, in grocery stores and kitchens, on the desks of editors and draftsmen, on shop floors, highways, and the moon, where thanks to missions achieved entirely with our out-dated pounds, gallons, and miles, America once again stood alone.