The Supreme Court announced Tuesday it will take up the case of District of Columbia v. Heller, setting the stage for its first hard look in nearly 70 years at the meaning of the Second Amendment’s “right of the people to keep and bear arms.”

Washington, D.C., Attorney General Linda Singer petitioned the Court to reverse a March 9 ruling by the U.S. Court of Appeals for the D.C. Circuit that the amendment protects an individual, rather than a collective or militia right to keep arms. On that basis, the D.C. Circuit, in a decision written by senior judge Laurence Silberman, struck down D.C.’s strict gun control ordinance.