the privilege by characterizing the documents as "attorney-client communication[s]" without explanation.") (citing United States v. Constr. Prods. Research, Inc., 73 F.3d 464, 473 (2d Cir.1996)).8 Once the Government has cataloged the documents in its privilege log, it then bears the burden of proving the app

are a privilege log. That omission is fatal. Id. at 576 (internal citations omitted; emphasis added). See also United States v. Construction Prods. Research, Inc., 73 F.3d 464, 473 (2d Cir. 1996) ("if the party invoking the privilege does not provide sufficient detail to demonstrate fulfillment of the legal re