Gun buyback program collects thousands of weapons

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)

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)

Guns are piled inside a crate outside a police station in Tucson, Ariz. on Tuesday, Jan 8, 2013, during Tucson City Councilman Steve Kozachik's gun buy back program. Kozachik asked 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)

Guns are piled inside a crate outside a police station in Tucson, Ariz. on Tuesday, Jan 8, 2013, during Tucson City Councilman Steve Kozachik's gun buy back program. Kozachik asked 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)

An impromptu gun buyer sells a gun to a woman that he purchased outside a police station in Tucson, Ariz. Tuesday, Jan 8, 2013. About a dozen buyers offered cash to sellers in the parking lot of a police station where Tucson City Councilman Steve Kozachik set up a gun buy back program asking people to turn in their guns for a $50 gift certificate to a grocery store. The buyers were trying to purchase weapons from sellers in an effort to circumvent Councilman Kozachik's buyback program. (AP Photo/Matt York)

Evanston police officer documents some information on a firearm that was turned in as part of an amnesty-based gun buyback program in Evanston, Illinois

An Evanston police officer documents some information on a firearm that was turned in as part of an amnesty-based gun buyback program in Evanston, Illinois December 15, 2012. Residents were given $100 for each operational firearm given in, and no criminal charges would be laid. REUTERS/Jim Young (UNITED STATES - Tags: CRIME LAW)

New Haven police officers catalogue guns being turned in during a gun buyback event in New Haven

New Haven police officers catalogue guns being turned in during a gun buyback event at the New Haven Police Academy in New Haven, Connecticut, December 22, 2012. The program, sponsored by the Injury Free Coalition for Kids of New Haven and Yale-New Haven Children's Hospital, offered gift cards in exchange for working guns. REUTERS/ Michelle McLoughlin (UNITED STATES - Tags: SOCIETY)

Assorted hand guns turned in during a gun buyback event at the Bridgeport Police Department's Community Services Division in Bridgeport

Assorted hand guns turned in during a gun buyback event are seen at the Bridgeport Police Department's Community Services Division in Bridgeport, Connecticut, in the wake of the shootings at Sandy Hook Elementary School, December 22, 2012. REUTERS/ Michelle McLoughlin (UNITED STATES - Tags: SOCIETY)

Hand guns that were turned in by their owners are seen in a trash bin at a gun buyback held by the LAPD following the mass shooting at Sandy Hook Elementary School in Connecticut, in Los Angeles

Hand guns that were turned in by their owners are seen in a trash bin at a gun buyback held by the Los Angeles Police Department following the mass shooting at Sandy Hook Elementary School in Connecticut, in Los Angeles, California, December 26, 2012. The program normally occurs in May but Los Angeles mayor Antonio Villaraigosa accelerated the schedule in response to the December 14 shooting that left 20 children and six adults dead, along with the gunman, and caused a national outcry against gun violence. People can anonymously trade in their guns, no questions asked, for $200 grocery store gift cards for automatic weapons and $100 gift cards for shotguns, handguns and rifles. REUTERS/David McNew (UNITED STATES - Tags: SOCIETY)

Evanston police officer holds a firearm that was turned in as part of an amnesty-based gun buyback program in Evanston, Illinois

An Evanston police officer holds a firearm that was turned in as part of an amnesty-based gun buyback program in Evanston, Illinois December 15, 2012. Residents were given $100 for each operational firearm given in and no criminal charges were laid. REUTERS/Jim Young (UNITED STATES - Tags: CRIME LAW)

Guns that were turned in by their owners are seen in a trash bin at a gun buyback held by the LAPD

A small portion of guns that were turned in by their owners are stacked inside a truck at a gun buyback held by the Los Angeles Police Department in Los Angeles, California, December 26, 2012 following the mass shooting at Sandy Hook Elementary School in Connecticut. The program normally occurs in May but Los Angeles mayor Antonio Villaraigosa accelerated the schedule in response to the December 14 shooting that left 20 children and six adults dead, along with the gunman, and caused a national outcry against gun violence. People can anonymously trade in their guns, no questions asked, for $200 grocery store gift cards for automatic weapons and $100 gift cards for shotguns, handguns and rifles. REUTERS/David McNew (UNITED STATES - Tags: CRIME LAW SOCIETY)

Police officers collect guns from people in their cars at a gun buyback held by the LAPD in Los Angeles

Police officers collect guns from people in their cars at a gun buyback held by the Los Angeles Police Department in Los Angeles, California, December 26, 2012 following the mass shooting at Sandy Hook Elementary School in Connecticut. The program normally occurs in May but Los Angeles mayor Antonio Villaraigosa accelerated the schedule in response to the December 14 shooting that left 20 children and six adults dead, along with the gunman, and caused a national outcry against gun violence. People can anonymously trade in their guns, no questions asked, for $200 grocery store gift cards for automatic weapons and $100 gift cards for shotguns, handguns and rifles. REUTERS/David McNew (UNITED STATES - Tags: CRIME LAW SOCIETY POLITICS)

Bridgeport police officer Peter Garcia looks for a serial number on a rifle during a gun buyback event in Bridgeport

Bridgeport police officer Peter Garcia looks for a serial number on a rifle during a gun buyback event at the Bridgeport Police Department's Community Services Division in Bridgeport, Connecticut, in the wake of the shootings at Sandy Hook Elementary School, December 22, 2012. REUTERS/ Michelle McLoughlin (UNITED STATES - Tags: SOCIETY)