forfeitures shall be in addition to any other general or specific, penalties herein provided. It shall be the duty of the various district attorneys [U.S. attorneys], under the direction of the Attorney General of the United States, to prosecute for the recovery of forfeitures under this Act. The costs and expenses of such prosecutions shall be paid from the appropriation for the expenses of the courts of the United States.
(3) "agency" means -- (A) The Commission, when the order sought to be reviewed was entered by the Federal Communications Commission. . . .
§ 2342. Jurisdiction of court of appeals