.2d 921 (2003); and United States Farner, 251 F.3d 510 (5th Cir.2001). lip [3] A "plain" error • one that is "clear" or "obvious." United States Olano, 507 U.S. 725, 734, 113 S.O. 1770, 123 .Ed.2d 508 (1993). The Supreme Court dlussed when an error must be plain in Johnson United States, 520 U.S