The opinion was written by Scalia.
The decision was split 5-4.
The DC gun ban has been rejected.
The Supreme Court has affirmed the individual right to bear arms. Thanks for giving us a scare Scalia (opinions are issued in order of seniority, Alito had the first, Scalia had the second, leaving Scalia, Roberts, or Stevens to author Heller).
... in other news the Millionaire's Amendment (Davis v. FEC), which required certain reporting of spending if an individual desired to spend more than $350,000 of his own money in a political campaign, was struck down as unconstitutional. The ruling was 5-4 along ideological grounds (Kennedy joined Scalia, Alito, Thomas, and Roberts in supporting free speech).