FILE - In this Jan. 30, 2013 file photo, former former U.S. 

FILE - In this Jan. 30, 2013 file photo, former former U.S. Rep. Gabrielle Giffords, who survived a gunshot to the head in 2011, during a mass shooting in Tucson, Ariz., sits ready with her husband, retired astronaut Mark Kelly, at a Senate Judiciary Committee hearing on Capitol Hill in Washington to discuss legislation to curb gun violence after the death of 20 schoolchildren in the shooting rampage late last year in Newtown, Conn. Giffords told the committee that Congress must reform the nation's gun laws, and Kelly got into a terse discussion at the witness table with National Rifle Association Executive Vice President Wayne LaPierre.  (AP Photo/J. Scott Applewhite, File)
Associated Press
FILE - In this Jan. 30, 2013 file photo, former former U.S. Rep. Gabrielle Giffords, who survived a gunshot to the head in 2011, during a mass shooting in Tucson, Ariz., sits ready with her husband, retired astronaut Mark Kelly, at a Senate Judiciary Committee hearing on Capitol Hill in Washington to discuss legislation to curb gun violence after the death of 20 schoolchildren in the shooting rampage late last year in Newtown, Conn. Giffords told the committee that Congress must reform the nation's gun laws, and Kelly got into a terse discussion at the witness table with National Rifle Association Executive Vice President Wayne LaPierre. (AP Photo/J. Scott Applewhite, File)
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