nt that a United States Attorney may bind other districts in a plea agreement if there is an affirmative appearance to that effect. United States v. Gebhie, 294 F.3d 540, 54749 (3d Cir. 2002); United States v. Van Thornout, 100 F.3d 590, 594 (8th Cir. 1996); United States v. Harvey, 791 F.2d 294, 303 (