16(b)(1)(A) does not require disclosure of impeachment evidence); United States v. Moore, 208 F.3d 577, 579 (7th Cir. 2000) (same); United States v. Haffield, No. 06 Cr. 550 (JS), 2009 WL 10673619, at *1-2 (E.D.N.Y. Apr. 22, 2009) (same) (citing Medearis and Moore); see also United States v. Gray-Bwriss,