MEXICO CITY -- Mexico has some of the most restrictive gun laws in the world. If any of the nation's 112 million citizens want to buy firearms, there's only one store where they can do it legally. It's on a sprawling military base and run by the army.
That, however, hasn't stopped Mexicans from acquiring firearms. The country is awash in illegal guns, many of them assault weapons in the hands of merciless criminal gangs. President Felipe Calderon says authorities have seized more than 140,000 weapons since he came to office in late 2006. Many of them, Mexican officials assert, were purchased in the United States.