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Radio-wave communications signals travel through the air in a straight line, reflect off of clouds or layers of the ionosphere, or are relayed by satellites in space. They are used in standard broadcast radio and television, shortwave radio, navigation and air-traffic control, cellular telephony, and even remote-controlled toys.
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The U.S. judiciary features a dual court system comprising a federal court system and the courts in each of the fifty states. On both the federal and state sides, the U.S. Supreme Court is at the top and is the final court of appeal.
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I believe the answer is because it didn't have enough money.