Answer:
The statement is true. All areas of the country belong to a circuit, which is part of the federal court system.
Step-by-step explanation:
The federal appellate courts in the United States are the US Court of Appeals. Organizationally, they are located in the Federal Court System, between the United States District Courts and the Supreme Court. They decide on appeals against judgments of a (usually first-instance) federal court or decisions of certain federal authorities.
There are currently 12 general courts of appeal, whose jurisdiction is geographical. The twelve are each responsible for a jurisdiction (called circuit). Eleven of them carry numbers (the corresponding court is then called United States Court of Appeal for the Tenth Circuit, for example). There is also the court for the District of Columbia, whose outstanding importance derives from its responsibility for the many federal authorities located there.