Today the U.S. Court of Appeals for the Ninth Circuit hears argument en banc in a controversial gun control case.  The summary to the three-judge panel opinion describes the case:

The panel reversed the district court's summary judgment and held that a responsible, law-abiding citizen has a right under the Second Amendment to carry a firearm in public for self-defense.

Plaintiffs challenged a County of San Diego policy which interpreted California's restriction on carrying handguns in public. California generally prohibits the open or concealed carriage of a handgun, whether loaded or unloaded, in public locations, absent the showing of, among other things, good cause. Under San Diego's policy, concern for one's personal safety alone is not considered good cause.

Ashby Jones has this article in the WSJ.  The court has this case page.  The oral argument is here.