; and (2) require, by subpoena or otherwise, the attendance and testimony of witnesses and the production of books, records, correspondence, memoranda, papers, and documents. (b) Subpoenas (1) Service Subpoenas issued under subsection (a)(2) may be served by any person designated by the Commission. (2) Enforcement (A) In general In the case of contumacy or failure to obey a subpoena issued under subsection (a)(2), the United States district court for the judicial district in which the subpoenaed person resides, is served, or may be found, or where the subpoena is returnable, may issue an order requiring such person to appear at any designated place to testify or to produce documentary or other evidence. Any failure to obey the order of the court may be punished by the court as a contempt of that court. (B) Additional enforcement Sections 102 through 104 of the Revised Statutes of the United States (2 U.S.C. 192 through 194) shall apply in the case of any failure of any witness to comply with any subpoena or to testify when summoned under authority of this section. (c) Closed Meetings Notwithstanding any other provision of law which would require meetings of the Commission to be open to the public, any portion of a meeting of the Commission may be closed to the public if the President determines that such portion is likely to disclose matters that could endanger national security. (d) Contracting The Commission may, to such extent and in such amounts as are provided in appropriation Acts, enter into contracts to enable the Commission to discharge its duties under this Act. (e) Information from Federal agencies The Commission may secure directly from any department, agency, or instrumentality of the United States any information related to any inquiry of the Commission conducted under this Act. Each such department, agency, or instrumentality shall, to the extent authorized by law, furnish such information directly to the Commission upon request. (f) Assistance From Federal Agencies (1) General services