District of Columbia v. Heller
In a 5–4 decision, the Supreme Court held that the Second Amendment protects an individual right to possess a firearm unconnected with service in a militia and to use it for traditionally lawful purposes such as self-defense within the home. The Court struck down the District of Columbia’s ban on handgun possession in the home and its requirement that other lawful firearms be kept disassembled or trigger-locked, while stating that the right is not unlimited and that longstanding prohibitions, such as those on possession by felons, were not cast into doubt.