confidential information about a competitive bid, United States v. Matzkin, 14 F.3d 1014, 1020 (4th Cir. 1994); secret grand jury information, United States v. Jeter, 775 F.2d 670, 680 (6th Cir. 1985); and information about a witness’s whereabouts, United States v. Sheker, 618 F.2d 607, 609 (9th Cir. 1980) (per curiam).
