Castro-Vargas v. United States; Chavez-Torres v. United States; Contreras-Cervantes v. United States; Cortes-Melendez, aka Macias-Saldana v. United States; Gomez-Garcia v. United States; Gonzalez, aka Garcia-Perez v. United States; Hernandez-Rivera v. United States; Hipolito-Trevino v. United States; Ibarra-Rodriguez v. United States; Jimenez-Santos v. United States; Lopez-Macedo v. United States; Meza-Caro, aka Meza-Cano v. United States; Rivera-Godinez v. United States; Rocha-Hernandez v. United States; and Quintana-Romero v. United States, 546 U.S. 991