About 253,000 firearms are bought in the US and transported illegally into Mexico each year, according to estimates published on March 18 by researchers at the University of San Diego's Trans-Border Institute and the Rio de Janeiro-based Igarapé Institute. The researchers' report, "The Way of the Gun: Estimating Firearms Traffic Across the US-Mexico Border," estimates that these sales generate $127.2 million a year in revenue and account for about 2.2% of the annual firearms sales in the US. During 2010-2012 an estimated 46.7% of federally licensed firearm dealers "depended for their economic existence on some amount of demand from the US-Mexico firearms trade to stay in business," the report says.

Two women are among the dead in a fierce gun battle that claimed five lives March 16 in Reynosa, Tamaulipas, just across the Mexican border from Hidalgo, Tex. Tamualipas state authorities said the women were among the combatants. The fire-fight came one day after Mexican federal police found more than five tons of marijuana, 370 pounds of crystal methamphetamine and a large weapons cache in underground bunkers in Reynosa—including 20 rifles, 10 bulletproof vests, a gas grenade, 20 uniforms, radios and tire spikes. March 11 also saw a three-hour gun battle in the streets of Reynosa, with rival narco-factions using automatic weapons and grenades. Authorities were absent for most of the shoot-out that left some three dozen gunmen and two bystanders dead—one just a teen. An exact death toll was elusive, as cartel gunmen collected their own dead during the battle.

Reversing a September 2011 decision by a lower court, on March 8 Argentina's federal Criminal Appeals Court found former Argentine president Carlos Saúl Menem (1989-1999) guilty of "aggravated smuggling" in the government's clandestine sales of 6,500 tons of arms to Ecuador and Croatia from 1991 to 1995. The court also convicted former defense minister Oscar Camilión, former colonel Diego Palleros and nine others in the scheme to smuggle arms to the two countries during a time when international agreements banned the sales. Menem claims he didn't know the ultimate destination of the arms when he signed the three secret decrees authorizing the shipments.

On Jan. 14 Mexican poet and human rights activist Javier Sicilia and Mexican political scientist Sergio Aguayo Quezada brought the US embassy in Mexico City a letter signed by 54,558 people calling on US president Barack Obama and other officials to stop the flow of smuggled firearms from the US to Mexico. "Our country is bleeding to death," the letter read, referring to the violence that followed the militarization of the "war on drugs" by former president Felipe Calderón  Hinojosa (2006-2012). "More than 60,000 Mexicans were murdered during the Calderón administration. In the first month of [current president] Enrique Peña Nieto, December 2012, 755 people were executed. The majority of them died from wounds caused by weapons obtained in the US."

The Mexican media have closely followed the renewed US interest in gun control after the killing of 20 children and eight adults in Newtown, Connecticut on Dec. 15. Laws regulating the sale of firearms in the US have an immediate impact on Mexico, where some 50,000 people have been killed since 2006 in the government's "war on drugs" and in fighting between rival drug cartels. Statistics that the US Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) submitted to the US Senate in 2011 indicate that some 70% of the illegal firearms seized in Mexico in 2009 and 2010 came from the US; Mexico itself has very strict controls on gun ownership.

It never fails. Every time something ghastly happens, from the Wisconsin Sikh temple massacre to the Oslo terror attacks to the Fort Hood Shootings to (d'oh!) 9-11, lugubrious conspiranoids have got to descend like ravenous vultures with bogus theories about how it was a "false flag" job perpetrated by a "Manchurian Candidate." The horrific bloodletting at the elementary school in Newtown, Conn., is, alas, no exception. And in this case, the theory has simply no basis in reality—it isn't even a distortion, contortion, embellishment or obfuscation—it is a simple invention, straight up. Yet animated partisans are plastering posts about it on my Facebook wall right and left—seemingly in all earnestness. Big ups to Talking Points Memo for rising to the tiresome ocassion of shooting down this jive:

Friendly fire caused the death of US Border Patrol agent Nicholas Ivie and the wounding of a fellow agent near the Arizona-Mexico border this week. Three agents were patrolling a remote sector about five miles north of the border where sensors indicated the presence of smugglers, when two agents mistakenly opened fire on the third, authorities now say. Ivie himself is now said to have fired first. The clarification came after nearly a week of speculation that Mexican smugglers shot the agents. Yet, in a little-noticed contradiction to what is now the official story, Mexican police arrested two suspects within days of the shootings—raising the possibility that the arrests were a politically motivated response to US pressure. Sen. Chuck Grassley (R-IA) was quick to politicize the death of the agent, claiming possible links to the "Fast and Furious" weapons scandal. Since Ivie was apparently killed by another US agent—using a service weapon, according to ballistic reports—Grassley may have to rescind his statement. (Mexico Solidarity Network, Oct. 8; AP, Oct. 7)

On Sept. 19 Michael Horowitz, the inspector general of the US Department of Justice, released a 471-page report on Operation Fast and Furious, a bungled program in which the Arizona office of the Bureau of Alcohol, Tobacco and Firearms (ATF) inadvertently let about 2,000 firearms pass into Mexico during 2009 and 2010, with many of the weapons apparently going to Mexican drug traffickers . The inspector general, a sort of internal auditor for the Justice Department, found that the ATF and US prosecutors in Arizona were at fault in the operation, along with Justice officials in Washington who were responsible for supervising the ATF and the federal prosecutors.