They found a military-style uniform in Lanza's bedroom and handwritten notes containing the addresses of local gun shops.

NPR: Arsenal Of Weapons Found In Newtown Gunman's Home

Pastor pointed out that there are 7, 600 gun shops in the United States within 100 miles of the Mexican border.

CNN: Latin America to hold summit to fight crime

Mexican officials point out that many of those weapons are bought at gun shops just over the border in the United States.

ECONOMIST: Mexico

Federally licensed gun shops must use the National Instant Criminal Background Check System, or NICS. Private sellers and gun shows have no background check requirement.

CNN: STORY HIGHLIGHTS

Those who advocate tighter laws say it is a loophole that they can sell with out the background checks that regular gun shops must carry out.

BBC: Booming business at an Indiana gun show

House and Senate Republicans were insisting upon 24 hours, while Democrats want a 72-hour waiting period, the same length of time imposed on sales at gun shops.

CNN: Senate Democrats cry foul over gun-control delays

As for Fast and Furious, the strange idea behind it for the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) was to encourage gun shops near the border to sell guns to shady characters.

FORBES: In Troubled Times, President Obama Continues to Lead From Behind

Mexican police claim that since the ban lapsed in 2004, the cartels have become much more powerfully armed: of 30, 000 guns they have seized since December 2006, 15, 000 are assault weapons, nearly all bought at the 7, 500 or so gun shops on the American side of the border.

ECONOMIST: Mexico and the United States

Club members were encouraged to post flyers in gun and tackle shops and to encourage sportsmen to call cable systems and insist they add the Outdoor Channel.

FORBES: Call Of The Wild

Only time will tell if this is just an emotional and political reaction or a long-term move by big-box retailers that have already priced out many of the mom-and-pop local gun-and-tackle shops.

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