A national initiative aimed at curbing gun violence was launched by former US. Rep. Gabrielle Giffords and her husband, Mark Kelly, on Tuesday -- the second anniversary of the shooting that killed six people and left her critically injured. A new campaign website, Americans For Responsible Solutions, promised to “launch a national dialogue and raise funds to counter influence of the gun lobby.” The couple last week visited Newtown, Conn., where a gunman opened fire in an elementary school, killing 20 children and six adults in December. They also met with New York City Mayor Michael Bloomberg, a gun control...