In a major victory for gun rights advocates, a federal appeals court on Thursday sided with a broad coalition of gun owners, businesses and organizations that challenged the constitutionality of a Maryland ban on assault weapons and other laws aimed at curbing gun violence. A three-judge panel of the U.S. Court of Appeals for the 4th Circuit said the state's prohibition on what the court called "the vast majority of semi-automatic rifles commonly kept by several million American citizens" amounted to a violation of their rights under the Constitution. "In our view, Maryland law implicates the core protection of the...