The Supreme Court will rule on the scope of the Second Amendment's right to bear arms for the first time in nearly 70 years after deciding yesterday to hear arguments on whether D.C. residents can keep handguns in their homes. The court's decision marks the first time it has weighed in on the Second Amendment since 1939. The decision is expected to change how localities and states across the nation approach gun regulations. D.C. Mayor Adrian M. Fenty, a Democrat, yesterday called the court's decision to hear the case good news for city residents. "We welcome the opportunity to take...