Neill v. Dep't of Justice, No. 91-3319 (D.D.C. July 20, 1993) (Exemption 2: protects source symbol numbers because they are of no substantial public interest and are used solely as an internal means of identifying confidential sources) (Exemption 5: the attorney work-product privilege protects information prepared by the FBI in anticipation of litigation in Oklahoma state court; the deliberative p