gun laws gun laws

After training, teachers and other staffers in South Dakota could choose to bring guns with them to school if their districts want to set up "sentinel" programs. Jim Urquhart /Reuters /Landov hide caption

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Jim Urquhart /Reuters /Landov

Former Rep. Gabby Giffords, D-Ariz., and her husband Mark Kelly at Wednesday's Senate hearing about gun violence. Chip Somodevilla/Getty Images hide caption

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Chip Somodevilla/Getty Images

Neil Heslin brought a framed photo of himself and his son Jesse (when the boy was an infant) to Monday's hearing in Hartford, Conn. The 6-year-old was killed at Sandy Hook Elementary School in December's shooting. Cloe Poisson/Hartford Courant /MCT /Landov hide caption

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Cloe Poisson/Hartford Courant /MCT /Landov

President Obama at the White House today, with Vice President Biden in the background. Mandel Ngan/AFP/Getty Images hide caption

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Mandel Ngan/AFP/Getty Images

At a gun shop in Phoenix, a customer holds a handgun. Among the executive actions President Obama is expected to propose is an expansion of background checks for gun buyers. Ralph D. Freso /Reuters /Landov hide caption

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Ralph D. Freso /Reuters /Landov

Shotguns sit on display at a gun show in Stamford, Conn., last week. Demand has risen for firearms as the White House prepares its new plan for gun control measures. New surveys find that a majority of Americans support some measures. Timothy A. Clary/AFP/Getty Images hide caption

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Timothy A. Clary/AFP/Getty Images

Handgun barrels on the assembly line of Hi-Point Firearms in Mansfield, Ohio. Gus Chan/The Plain Dealer /Landov hide caption

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Gus Chan/The Plain Dealer /Landov

Meet the Press host David Gregory holds what he described as a high-capacity ammunition magazine during the Dec. 23 program. Uncredited/AP hide caption

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Uncredited/AP

Vice President Biden and President Obama at the White House on Dec. 19. Biden has been charged with drawing up "concrete proposals" on how to reduce gun violence. Fang Zhe/Xinhua /Landov hide caption

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Fang Zhe/Xinhua /Landov