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The United States was one of the original signatories of the Metre Convention [1]. The metric system has been the foundation of all US measures since 1893 [2,3]. School children in the United States have learned both systems for decades. Ford trucks have metric bolts. The US military uses the metric system.

That's the form the data came in and when it came time to convert it, I figured it might be better not to.

It will happen if we keep making new things (like this tool) that use km instead of miles.