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Antique gun collector Richard Kravarik poses with an antique hand gun during the East Coast Fine Arms Show in Stamford, Connecticut, January 5, 2013. REUTERS/Carlo Allegri ( USA-GUNS/NEWTOWN )

Morgan Meritt of Del City, Oklahoma, joins other members of the Oklahoma Open Carry Association (OKOCA) wearing unconcealed side arms as they gather at Beverly's Pancake House in Oklahoma City November 1, 2012. A new Oklahoma law took effect November 1 allowing anyone with a concealed weapon license to carry their firearms openly in a holster or belt. REUTERS/Bill Waugh ( USA/ )

A sign is seen on top of ammunition at Coliseum Gun Traders Ltd. in Uniondale, New York January 16, 2013. REUTERS/Shannon Stapleton ( USA-GUNS/ )

An unidentified man fires his Glock 9 mm pistol at the Maryland Small Arms Range in Upper Marlboro, Maryland, just outside Washington, April 17, 2007. REUTERS/Yuri Gripas ( USA/ )

One of several billboards of a gun raffle promotion at Adventures Outdoors in Smyrna, Georgia, October 25, 2012. The store has promoted the raffle on billboards as a "Vote. Win a rifle." but owner Jay Wallace has stated that all Georgia residents were eligible to enter. REUTERS/Tami Chappell ( USA-ELECTION/ )

A man with a firearm listens to Pastor Ken Pagano during the "Open Carry Celebration" at New Bethel Church in Louisville, Kentucky, June 27, 2009. Around 200 members of the church complied with a request asked to bring their unloaded handguns for a one-day celebration of the Second Amendment which stipulates the right to bear arms. REUTERS/Ed Reinke/Pool ( USA-GUN )

Connor Kennedy, 7, from Farmingdale, New York, holds the M4 carbine rifle of a marine from 1st Battalion 9th Marines Charlie Company 2nd Platoon during a demonstration put together by the Marines as part of Fleet Week in East Meadow, New York, May 26, 2012. As part of the demonstration, Marines from the 1st Battalion 9th Marines Charlie Company 2nd Platoon flew in a V-22 Osprey from New York to Eisenhower Park in East Meadow, New York and stormed a field, where civilians could watch the demonstration. Marines spoke to civilians after the demonstration and civilians could tour various aircraft, including the V-22 Osprey. REUTERS/Andrew Burton ( USA/ )

Control Arms campaigner David Grimason lays a photo of his son Alistair, who was killed by stray bullets in a gun fight, at the base of a mock tombstone which Control Arms coalition set up next to the United Nations building in New York, July 25, 2012. REUTERS/Andrew Kelly/Control Arms/Handout ( USA/ )

Tom Sullivan, center, hugs his wife Terry, left, and daughter Megan outside Gateway High School, Friday July 20, 2012, in Aurora. Sullivan was still missing his son, who he said was at the movies in the the Century 16 theater where about 50 people were shot 12 fatally early Friday in Aurora. RJ Sangosti, The Denver Post ( MOVIE_1RJ8957 )

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 would be laid. REUTERS/Jim Young ( USA-ILLINOIS/GUNS )

Gun shop customers shop for weapons as they listen to live streaming video of an announcement about gun control by U.S. President Barack Obama at the Bullet Hole gun shop in Sarasota, Florida January 16, 2013. REUTERS/Brian Blanco ( USA-GUNS/OBAMA )

Antique gun collector Dave Kleiner reviews paperwork during the East Coast Fine Arms Show in Stamford, Connecticut, January 5, 2013. REUTERS/Carlo Allegri ( USA-GUNS/NEWTOWN )

Jeremy Chavez helps his son Ryan, 6, with target practice before a wild hog hunt at Great Southern Outdoors Wildlife Plantation in Union Springs, Alabama, Saturday June 16, 2012. Fast, smart and dangerous, the wild boar was once the most prized hunter's catch in ancient Greece. Now it is becoming a popular target of hunters in the United States. An explosion of wild pig populations has become such a nuisance that hunting seasons are being flung wide open for wild hog across the nation. REUTERS/Michael Spooneybarger ( USA-PIGS/WILD )

A row of shotguns are seen during the East Coast Fine Arms Show in Stamford, Connecticut, January 5, 2013. REUTERS/Carlo Allegri ( USA-GUNS/NEWTOWN )

Students learn to fire their pistols at a class taught by King 33 Training at a shooting range on February 24, 2013 in Wallingford, Connecticut. King 33 Training, a company that trains and educates individuals on the safe and proper use of guns and other uses of protective force, offers classes to marksmen of all levels. The Connecticut company offers training for clients interested in maintaining a safe environment for themselves, their families, and those around them. Connecticut, home to a number of gun manufactures including Colt Defense, is a state with conflicting views on guns and gun ownership. Currently the state has some of the strictest gun control laws in the nation and its current governor Daniel Malloy is pushing for tougher measures following the shootings at the Sandy Hook School. (Photo by Spencer Platt/Getty Images) ( 162529319 )

U.S. Vice President Joe Biden makes remarks to reporters before he meets with representatives from the video game industry, in a dialogue about gun violence, in his office in Washington, January 11, 2013. REUTERS/Jonathan Ernst ( USA/ )

A group of local public school teachers from nearby schools use rubber training guns as they practice drills on disarming an attacker during a teachers-only firearms training class offered for free at the Veritas Training Academy in Sarasota, Florida January 11, 2013. REUTERS/Brian Blanco ( USA-GUNS/TEACHERS-TRAINING )

Protesters, including (front row L -R)Darren Wagner, Lori Haas, Roxanna Green and Pam Simon, gather to deliver a petition to Walmart during an anti-gun protest in Danbury, Connecticut, January 15, 2013. The petition was signed by about 300,000 citizens nationwide urging Walmart, the nation's largest gun retailer, to halt sales of assault weapons and munitions nationwide. Haas's daughter Emily was shot and injured in the mass shooting at Virginia Tech, Roxanne Green's daughter Christina-Taylor Green, 9, was shot and killed during an event in Tucson, Arizona and Pam Simon was shot during the same Tucson shooting. REUTERS/ Michelle McLoughlin ( USA-GUNS/WALMART )

U.S. President Barack Obama shoots clay targets with a shotgun on the range at Camp David, Maryland, in this White House handout photo taken August 4, 2012. REUTERS/White House/Pete Souza/Handout ( OBAMA-GUNS/ )

A sticker is seen at the Rocky Mountain Guns and Ammo store in Parker, Colorado July 24, 2012. REUTERS/Shannon Stapleton ( USA-SHOOTING/ )

Point Hope Alaska native, Aldred Omnik, 12-years-old, right, uses a bb-gun to try and shoot small birds practicing his hunting skills with Jolian Lane, left, 7-years-old, in tow along the north side of the village Monday afternoon, July 26th 2010. Point Hope Alaska, population of 800 people, is located along the Chukchi Sea coast of the Arctic Ocean. The village lives a mostly subsistence life of hunting whales, seal, caribou, walrus, salmon fish and many other species and have for thousands of years. The Denver Post/Andy Cross ( POINTHOPEPOINTHOPE_1113 )

Paul Hwang of Auburn, Washington, looks over a Mossberg shotgun during the annual SHOT (Shooting, Hunting, Outdoor Trade) Show in Las Vegas January 15, 2013. Gun dealers at the show are reporting booming sales resulting from worries about possible gun control legislation. REUTERS/Las Vegas Sun/Steve Marcus ( USA/ )

A shooting at The Century 16 movie theater that left 12 people dead and over 35 people in the hospital with gunshot wounds. The suspects car was found in the back of the theatre. ATF agents and police investigate the scene. Helen H. Richardson, The Denver Post ( cd20SHOOTINGDSC_3605 DSC_3605 )

U.S. Republican presidential candidate and former Pennsylvania Senator Rick Santorum looks on during a pheasant hunt in Adel, Iowa December 26, 2011. REUTERS/Joshua Lott ( USA/ )

A shooitng target is full of bullet holes at a class taught by King 33 Training at a shooting range on February 24, 2013 in Wallingford, Connecticut. (Photo by Spencer Platt/Getty Images) ( 162529335 )

New York Governor Andrew Cuomo talks about the New York Secure Ammunition and Firearms Enforcement Act in Albany, New York January 15, 2013. Cuomo signed into law one of the nation's toughest gun-control measures and the first to be enacted since the mass shooting at an elementary school in neighboring Connecticut. REUTERS/Hans Pennink ( USA-GUNS/NEWYORK )

In this photo provided by the National Rifle Association's Whittington Center, Wayne Armacost, standing, the center's executive director, helps teenager William Crouch of Texas take aim with a Barrett 50-caliber at a 1,000-yard shooting range at the center near Raton, N.M. in 2006. The center is billed as the most comprehensive shooting facility in the United States. Maintained by donor contributions and located in scenic northeastern New Mexico, the center is a monument to competitive, recreational and educational uses for firearms ranging from pistols to hunting rifles. (AP Photo/NRA Whittington Center) ( NRA Whittington Center )

U.S. President Barack Obama high-fives eight-year-old Hinna Zejah after unveiling a series of gun control proposals during an event at the White House in Washington, January 16, 2013. Hinna and her mother Nadia (Behind L) was among a group of children and families of children who wrote the president letters about guns and gun control after the December 14 school shooting in Newtown, Connecticut, in which 20 children and six adults were killed. REUTERS/Jason Reed ( USA-GUNS/ )

Brianna, 9, of the North Florida Survival Group carries an AK-47 rifle from the group leader's truck before heading out to conduct enemy contact drills during a field training exercise in Old Town, Florida, December 8, 2012. REUTERS/Brian Blanco ( USA-MILITIA/ )

Claremont police officers are the first to respond to a drill with the Los Angeles County Fire Department and Sheriff's Department, to conduct a training exercise at Scripps College in preparation for a school shooting in Claremont, California January 16, 2013. REUTERS/Alex Gallardo ( USA-GUNS/ )

Brandon Smith poses with his AR-15 rifle during a pro-gun and Second Amendment protest outside the Arizona State Capitol in Phoenix, Arizona January 19, 2013. Pro-gun activists held "high noon" rallies across the United States to defend the right to own firearms that they say is being threatened by U.S. President Barack Obama's gun-control proposals. REUTERS/Joshua Lott ( USA-GUNS/RALLIES )

A woman talks with her son as they participate in an anti-gun violence rally sponsored by One Million Moms for Gun Control in New York, January 21, 2013. REUTERS/Eduardo Munoz ( USA/ )

A member of the North Florida Survival Group carries an AR-15 rifle as he takes the point position in performing enemy contact drills during a field training exercise in Old Town, Florida, December 8, 2012.REUTERS/Brian Blanco ( USA-MILITIA/ )

A Los Angeles County Sheriff's volunteer catalogues guns being traded in at the 'Gifts for Guns' gun buyback in Compton, California, January 21, 2013. People could trade in their guns anonymously and with no questions asked in exchange for $200 gift cards for assault weapons, $100 gift cards for shotguns, handguns and rifles, and $50 for non-operational firearms.REUTERS/David McNew ( USA )

Andrew Josequera, 11, prepares to shoot at a target at the Los Angeles gun club in Los Angeles, January 23, 2013. REUTERS/Lucy Nicholson ( USA/ )

Former U.S. Rep. Gabrielle Giffords (L) delivers her opening remarks while seated next to her husband, former U.S. Navy Captain Mark Kelly, during a hearing held by the Senate Judiciary committee about guns and violence on Capitol Hill in Washington, January 30, 2013. REUTERS/Larry Downing ( USA-GUNS/CONGRESS )

Ronnie Chambers Jr. looks at his mother Tahitah Myles (obscured) as she collapses during the funeral for his father Ronnie Chambers, 33, a victim of gun violence, in Chicago February 4, 2013. Shirley Chambers of Chicago had four children - three boys and a girl. Now they're all gone. Her son, Ronnie Chambers, was the last of the single mother's children - all victims of gun violence in Chicago over a period of 18 years. REUTERS/John Gress ( USA-CHICAGO/GUNS )

Armed Maricopa County Sheriff posse members draw their weapons on a suspect during a simulated school shooting in Fountain Hills, Arizona, February 9, 2013. Controversial Arizona lawman Joe Arpaio, who styles himself as "America's Toughest Sheriff," has enlisted action film star Steven Seagal to lead a training exercise for members of his armed volunteer posse on how to respond to a school shooting. REUTERS/Darryl Webb ( USA-ARIZONA/SEAGAL )

Members of the North Florida Survival Group wait with their rifles before heading out to perform enemy contact drills during a field training exercise in Old Town, Florida, December 8, 2012. The group trains children and adults alike to handle weapons and survive in the wild. The group passionately supports the right of U.S. citizens to bear arms and its website states that it aims to teach "patriots to survive in order to protect and defend our Constitution against all enemy threats". REUTERS/Brian Blanco ( USA-MILITIA/ )

A woman is outlined in chalk while participating in a flash-mob that was organized in support of stricter gun laws, in Times Square, New York, February, 24, 2013. The flash mob started with people raising their hands into the air, then crumpling to the ground; once lying on the ground, some participants acted dead while others pretended to check vital signs of those who were "dead," before outlining the "dead" in chalk. REUTERS/Andrew Burton ( USA/ )

Neil Heslin, father of 6-year-old Newtown victim Jesse Lewis, cries during the Senate Judiciary Committee hearing on the Assault Weapons Ban of 2013 on Capitol Hill in Washington February 27, 2013. REUTERS/Yuri Gripas ( USA-GUNS/SENATE )

Louisa Davis (bottom L) and Sally Bawcombe kneel in front of the National Rifle Association headquarters during a rally by the activist group "MomsRising" urging for sensible gun regulation in Fairfax, Virginia, March 14, 2013. REUTERS/Larry Downing ( USA-GUNS/ )

Arizona Women's Shooting Associates and NRA certified instructor Carol Ruh gestures while holding a blue dummy handgun to her head as she teaches a gun safety training class at Ben Avery Shooting Facility in Phoenix, Arizona, March 13, 2013. Ruh educates her students on the proper way to hold, aim, shoot and load a firearm along with other safety tips. REUTERS/Joshua Lott ( USA-GUNS/ )

Susan Byrne-Dewhirst learns the proper way to hold a blue dummy handgun as she attends the Arizona Women's Shooting Associates and NRA gun safety training class taught by certified instructor Carol Ruh at Ben Avery Shooting Facility in Phoenix, Arizona, March 13, 2013. REUTERS/Joshua Lott ( USA-GUNS/ )

A group of men with automatic weapons for sale stand at the gun show at the Knob Creek Machine Gun Shoot near West Point, Kentucky April 9, 2005. Thousands of machine gun and military hardware enthusiasts attended the event held each year over weekends in the spring and fall. . REUTERS/Rick Wilking ( MACHINE GUNS )

Opening day 2012 of the dove hunting season. Two dove hunters and their dog watch the sunrise and skies for birds in south east Colorado picture by Emily Gleason ( SP05OUTDOORS )

Gun dealer Tom Mannewitz displays several United States-made assault-style rifles inside his Dallas, Texas gun shop, September 13, 2004. REUTERS/Jeff Mitchell ( ASSAULT WEAPONS BAN )

Various stickers stand on display at the 132nd Annual National Rifle Association Meeting in in Orlando, Florida April 27, 2003. With the NRA having a membership of approximately 4 million the annual event brings thousands to the meetings. © Shannon Stapleton / Reuters ( USA )

The US Capitol dome is shown in the background as flags fly at half staff in honor of the victims of the shooting in Arizona that injured US Representative Gabrielle Giffords (D-AZ), at the Washington Monument in Washington January 9, 2011. REUTERS/Jonathan Ernst ( USA-SHOOTING/CONGRESS )