amera review, the withheld records identified in Exhibit 1 to the supplemental Christenson declaration. Dkt. 39-1; see also 5 U.S.C. § 552(a)(4)(B); Intl Bhd. of Elec. Workers v. NLRB, 845 F.2 1177, 1180 (2d Cir. 1988) (propriety of in camera review "is a matter entrusted to the district court's discretio

e-by-case basis." Watson v. Fort Worth Bank & Trust, 487 U.S. 977, 995 n.3, 108 S. Ct. 2777, 101 L. Ed. 2d 827 (1988) (plurality opinion); see also Intl Bhd. of Teamsters v. United States, 431 U.S. 324, 340, 97 S. Ct. 1843, 52 L. Ed. 2d 396 (1977) . Neither "courts [n]or defendants [are] obliged to assum