Supreme Court rules on 18 USC 924's mandatory sentence
Dean v. United States, decided today. For repeated use of a firearm in violent offenses, defendant was subject to 30 years' imprisonment without probation or parole, this to be additional to sentences for the violent offense themselves.
The sentencing for the offenses themselves is affected by the Federal Sentencing Guidelines, which aren't really binding but are used as the starting point for determining a sentence. The Supreme Court ruled that, in determining a sentence, the trial court should also take into account that the defendant is subject to an additional mandatory term. Essentially, if in this case the court thinks 30 years is enough, and the Guidelines call for 10 years on the underlying offenses, the court should consider reducing the 10 years so as to get closer to what the court thinks is just.