AND NOW, this 13th day of January, 2012, upon consideration of the motion for sentence reduction (Doc. 136), pursuant to 18 U.S.C. § 3582(c)(2) Amendment 715, filed by defendant Percy Harris ("Harris"), wherein Harris asserts that the court incorrectly calculated his base offense level and subsequent sentencing range at his September 11, 2006, sentencing, and that the correct calculation based upon an agreement between the parties at the sentencing hearing results in a lower sentencing range, and it appearing that Harris is not seeking a sentence reduction pursuant to 18 U.S.C. § 3582(c)(2), but rather is attempting to challenge his sentence, and the court finding that the proper vehicle for Harris' request is a petition for writ of habeas corpus pursuant to 28 U.S.C. § 2255, and the court noting that Harris has previously filed a § 2255 petition that was denied (see Doc. 101), and the court finding that in order to file a second or successive petition for writ of habeas corpus, the applicant must move in the Third Circuit Court of Appeals for an order authorizing the district court to consider the second or successive habeas petition, see 28 U.S.C. § 2244(b)(3)(A), and that a panel of the Third Circuit Court of Appeals must certify that the successive motion contains either "(1) newly discovered evidence that, if proven and viewed in light of the evidence as a whole, would be sufficient to establish by clear and convincing evidence that no reasonable factfinder would have found the movant guilty of the offense; or (2) a new rule of constitutional law, made retroactive to cases on collateral review by the Supreme Court, that was previously unavailable," 28 U.S.C. § 2255(h), and it appearing that Harris has not sought or received authorization from the Third Circuit for this court to consider a second or successive habeas petition, and the court therefore concluding that it lacks the jurisdiction to consider a second or successive habeas petition, it is hereby ORDERED that the motion for reduction of sentence (Doc. 136), which the court construes as a second or successive habeas petition,*fn1 is DISMISSED for lack of jurisdiction.