Former President George W. Bush and his successor, President Obama, at the April 25 dedication of Bush's library on the campus of Southern Methodist University in Dallas. Larry W. Smith /EPA /LANDOV hide caption
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Guns on display at a show in Chantilly, Va., in July 2012. Jim Lo Scalzo /EPA /Landov hide caption
A Sig Sauer handgun on sale at a shop in Tucker, Ga. Erik S. Lesser /EPA /LANDOV hide caption
Gun Control: 'Only Modest Change' In Opinion Since Newtown Shootings
A gun shop in Glendale, Calif. Gabriel Bouys /AFP/Getty Images hide caption