<p>The National Rifle Association today filed a lawsuit challenging San Francisco's ban on handguns in public housing, trying to capitalize on the U.S. Supreme Court's historic ruling finding a constitutional right to own guns for self-defense in the home.</p>
<p>In a lawsuit filed in U.S. District Court in San Francisco, lawyers for gun rights advocates are asking a federal judge to invalidate San Francisco's handgun law based on the Supreme Court's decision striking down a broader Washington, D.C. law forbidding residents to own handguns.</p>