The Supreme Court of the United States rules that the Second Amendment still applies in federal enclaves in District of Columbia v. Heller.
District of Columbia v. Heller, 554 U.S. 570 (2008), was a landmark case in which the Supreme Court of the United States held that the Second Amendment to the United States Constitution protects an individual's right to possess a firearm for traditionally lawful purposes in federal enclaves, such as self-defense within the home. The decision did not address the question of whether the Second Amendment extends beyond federal enclaves to the states, which was addressed later by McDonald v. Chicago (2010). It was the first Supreme Court case in United States history to decide whether the Second Amendment protects an individual right to keep and bear arms for self defense.
On June 26, 2008, the Supreme Court affirmed the Court of Appeals for the D.C. Circuit in Parker v. District of Columbia. The Court of Appeals had struck down provisions of the Firearms Control Regulations Act of 1975 as unconstitutional, determined that handguns are "arms" for the purposes of the Second Amendment, found that the District of Columbia's regulations act was an unconstitutional banning, and struck down the portion of the regulations act that requires all firearms including rifles and shotguns be kept "unloaded and disassembled or bound by a trigger lock." "Prior to this decision the Firearms Control Regulation Act of 1975 also restricted residents from owning handguns except for those registered prior to 1975."