Aurora, Mass Shootings and America's Gun Laws

In 1929, American newspapers carried sensational pictures of crumpled, dead bodies, victims of Al Capone's St. Valentine's Day Massacre. President Franklin Roosevelt then persuaded Congress to restrict access to machine guns favored by gangsters. Since then, there have been many more multiple shootings, but the result has more often been sympathy, rather than action. In the aftermath of the massacre in Aurora, Colorado, New York Mayor Bloomberg wants President Obama and candidate Mitt Romney to talk about gun violence. Could that possibly be a winning issue for either side? What's the history of gun control? Are multiple killings America's "new normal?"