California must allow law-abiding citizens to carry concealed firearms in public, a federal appeals court ruled Thursday, striking down the core of the state's permit system for handguns. In a 2-1 decision, the Ninth U.S. Circuit Court of Appeals in San Francisco said San Diego County violates the Constitution's Second Amendment by requiring residents to show "good cause" - and not merely the desire to protect themselves - to obtain a concealed-weapons permit. State law requires applicants to demonstrate good cause, as well as good moral character, to carry concealed handguns, while leaving the permit process up to each city...