The Washington Post claims:
President Felipe Calderon reported this month that Mexican forces have captured more than 93,000 weapons in four years. Mexican authorities insist that 90 percent of those weapons have been smuggled from the United States. The U.S. and Mexican governments have worked together to trace 73,000 seized weapons, but both refuse to release the results of the traces.
This is false. The number is not 90%, but closer to 8%. And, the US government has released quite a lot of information on the traces. (Perhaps by the “results” of the traces, the Post means the raw information, but that would obviously be inappropriate to release, not to mention illegal.)
POSTSCRIPT: The actual topic of the article is an astonishing fact: There is only one gun store in all of Mexico and it’s very hard to buy a gun there. Nevertheless, there’s plenty of gun crime in Mexico. Imagine that.