Appealing the judgment in a criminal case, Bertin Rosales raises arguments that he concedes are foreclosed by United States v. Serfass, 684 F.3d 548, 552 (5th Cir. 2012), which held that “the [U.S.S.G.] § 2D1.1(b)(5) sentencing enhancement applies if ‘the offense involved the importation of amphetamine or methamphetamine’ regardless of whether the defendant had *259 knowledge of that importation.” . The Government’s motion for summary affirmance is GRANTED, its alternative motion for an extension of time to file a brief is DENIED, and the judgment of the district court is AFFIRMED.