Provide me some details about United States attorneys with the given text as a reference.

United States attorneys are officials of the U.S. Department of Justice who serve as the chief federal law enforcement officers in each of the 94 U.S. federal judicial districts. Each U.S. attorney serves as the United States' chief federal criminal prosecutor in their judicial district and represents the U.S. federal government in civil litigation in federal and state court within their geographic jurisdiction. U.S. attorneys must be nominated by the President and confirmed by the Senate, after which they serve four-year terms.

1. In each of the 94 federal court districts in the United States, United States attorneys are representatives of the U.S. Department of Justice who act as the top federal law enforcement officials.
2. Each U.S. attorney represents the U.S. federal government in civil action in federal and state court within their geographic jurisdiction and acts as the country's top federal criminal prosecutor in their judicial district.
3. U.S. attorneys serve four-year terms after being appointed by the President and being confirmed by the Senate.