Protesters call for House Speaker Paul Ryan to allow votes on gun violence prevention legislation in Washington, D.C., on July 6. Manuel Balce Ceneta/AP hide caption

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After Mass Shootings, Action On Gun Legislation Soars At State Level

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Gov. Jerry Brown signed six new bills into law Friday, nearly seven months after a mass shooting in San Bernardino, Calif. Two of the new laws restrict ammunition. In this photo from last summer, a man enters a gun store in Los Angeles. Mark Ralston/AFP/Getty Images hide caption

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The trade in alcohol — illegal under Prohibition — led to the rise of organized crime and men such as Chicago gangster Al Capone, photographed here on Jan. 19, 1931. AP hide caption

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Prohibition-Era Gang Violence Spurred Congress To Pass First Gun Law

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A marksman sights in on a target during a class for an Illinois concealed carry permit in February 2014. Scott Olson/Getty Images hide caption

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Handguns In America And The Rise Of The 'Concealed-Carry Lifestyle'

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Rep. John Lewis, D-Ga., leads lawmakers down the steps of the Capitol to greet a crowd assembled after House Democrats ended their 26-hour-long sit-in protest on Thursday. Evan Vucci/AP hide caption

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This photo provided by Rep. John Yarmuth, D-Ky., shows Democrat members of Congress, including Rep. John Lewis, D-Ga., (center) and Rep. Joe Courtney, D-Conn., (left) participating in a sit-down protest seeking a vote on gun control measures, Wednesday on the House floor. Rep. John Yarmuth/AP hide caption

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Everytown for Gun Safety teaches survivors of shootings how to use their stories to advocate for gun control legislation. Ruby Wallau/NPR hide caption

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A Million-Mom Army And A Billionaire Take On The NRA

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A woman walks with a sign to protest gun violence and call for sensible gun laws outside the White House on Monday. Molly Riley/AFP/Getty Images hide caption

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Assault Rifle Bans Find Life On State Level

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Katie Couric (right) and White House Senior Adviser Valerie Jarrett, speaking, participate in a panel discussion following a May 16 screening of Couric's documentary Under the Gun at the U.S. Navy Memorial in Washington. Paul Morigi/Getty Images for EPIX hide caption

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Police stand guard during demonstrations in reaction to a Cleveland police officer being acquitted of manslaughter charges on May 23, 2015, in Cleveland. Ricky Rhodes/Getty Images hide caption

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