and intimidation of witnesses, and revelation of the scope and nature of the Government's investigation.' Tipograph, 83 F. Supp. 3d at 239 (quoting Solar Sources. Inc. v. United States, 142 F.3d 1033, 1039 (7th Cir. 1998)). Indeed, "Exemption 7 was designed to prevent harm to the government's case in court by