; (3) administer oaths or affirmations and by subpoena require any person to appear and testify or to appear and produce books, records, and other writings, or both; (4) conduct investigations (including undercover) in the United States and in other countries, including intercepting any wire, oral, and electronic communications, conducting electronic surveillance, using pen registers and trap and trace devices, and carrying out acquisitions, to the extent authorized under chapters 119, 121, and 206 of title 18, United States Code, and other applicable laws of the United States; (5) inspect, search, detain, seize, or issue temporary denial orders with respect to items, in any form, that are subject to controls under this title, or conveyances on which it is believed that there are items that have been, are being, or are about to be exported, reexported, or transferred in violation of this title, or any regulations, order, license, or other authorization issued thereunder; (6) conduct prelicense inspections and post-shipment verifications