Tucson police officers catalog a gun outside a police station in Tucson, Ariz. Tuesday, Jan 8, 2013 during Tucson City Councilman Steve Kozachik's gun buyback program, asking people to turn in their guns for a $50 gift certificate to a grocery store. Tuesday marked the second anniversary of when a gunman opened fire on former Rep. Gabrielle Giffords as she met with constituents in 2011, killing six people and leaving 12 others injured. (AP ...
more Tucson police officers catalog a gun outside a police station in Tucson, Ariz. Tuesday, Jan 8, 2013 during Tucson City Councilman Steve Kozachik's gun buyback program, asking people to turn in their guns for a $50 gift certificate to a grocery store. Tuesday marked the second anniversary of when a gunman opened fire on former Rep. Gabrielle Giffords as she met with constituents in 2011, killing six people and leaving 12 others injured. (AP Photo/Brian Skoloff)
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