America's Gun Debate Continues: With Schools in the Crossfire

In just over two years since 26 killings at Sandy Hook Elementary in Newtown, Connecticut, there've been 100 school shootings: one every five weeks. Congress has done nothing, but in various states new laws and ballot measures are going in different directions. Some are toughening gun controls, while others are allowing concealed carry in public schools, and there’s big money for campaigns on both sides. At the same time -- while guns are still selling, the number of people who own guns is on the decline.

Last December, the Pew Research Center reported that — for the first time — a majority of Americans favored the rights of gun owners over gun control. Last week, a different finding by the University of Chicago: the number of Americans who live in a household with at least one gun owner is the lowest ever: just 32%, compared to 50% in the 1980's.

We look at some challenging contradictions.