Duhaney v. Attorney General, 621 F.3d 340 (3d Cir. Sept. 14, 2010), cert. denied (2011) (the government was not precluded, by res judicata, from charging respondent with removal in new proceedings based upon (1) convictions that existed at the time of the original proceedings, and that were known to the government, but that the government chose not to allege at the original proceedings, or (2) a conviction previously waived under INA 212(c) that became an aggravated felony after the termination of the original proceedings).