Maps That Show How The World Really Is
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Air Traffic Control
Hundreds of airports dot the continental United States, and instead of being in their own individual zones, they belong to this unique set of borders. Instead of being named after the states, they surround, they are named after the major city that they service.
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There are 21 zones in total and within those, each airport is responsible for the airspace above it. That airspace has a radius of about five miles.
