Why has public support for gun control decreased?

Aired: 12/15/2014 | 0:09:08 | Clip
Two years after the massacre at Sandy Hook Elementary School -- and for the first time in more than 20 years -- a majority of Americans support gun rights over gun control. Judy Woodruff talks to Carroll Doherty of the Pew Research Center and Joseph de Avila of The Wall Street Journal about shifting U.S. opinions on guns and safety.