Prior to Congress’ enacting the Antiterrorism and Effective Death Penalty Act (“AEDPA”) in 1996, there was no specific limit on the time within which a prisoner was required to file a § 2255 motion. The AEDPA’s amendment of 28 U.S.C. § 2255 imposed a one-year statute of limitations which is triggered by the latest of four events: (1) the date on which the judgment of conviction becomes final; (2) the date on which the impediment to making a motion created by governmental action in violation of the Constitution or laws of the United States is removed, if the movant was prevented from making a motion by such governmental action; (3) the date on which the right asserted was initially recognized by the Supreme Court, if that right has been newly recognized by the Supreme Court and made retroactively applicable to cases on collateral review; or (4) the date on which the facts supporting the claim or claims presented could have been discovered through the exercise of due diligence. All defendants thus have one year from the date on which their judgments of conviction become final within which to file § 2255 motions. Occasionally a particular defendant will be able to file a § 2255 motion beyond that date when a new year-long limitation period is triggered by one of the other events listed above.