1. Whether a court of appeals may affirm a sentence when the district court never calculated or identified the applicable Sentencing Guidelines range, notwithstanding this Court's repeated holdings that Guidelines calculation is the mandatory starting point for sentencing and that failure to do so constitutes procedural error.

2. Whether a sentence may be affirmed on plain-error review where the district court imposed a sentence more than double the high end of the applicable Guidelines range without any explanation tethered to a calculated range.

Whether a court of appeals may affirm a sentence when the district court never calculated or identified the applicable Sentencing Guidelines range and imposed a sentence more than double the high end of the correct range