The document summarizes the structure and organization of the three levels of the federal court system in the United States according to Article III of the US Constitution. It establishes that the judicial power is vested in the Supreme Court and any inferior courts established by Congress. It outlines the jurisdiction and roles of the Supreme Court, Circuit Courts of Appeals, and District Courts. The Supreme Court has appellate jurisdiction in most cases and original jurisdiction in those involving states or ambassadors. Below the Supreme Court are 13 Circuit Courts of Appeals and 94 District Courts that make up the first level where most cases are tried.