![A man armed with a semi-automatic rifle in Apatzingán (Michoacán State, Mexico), in 2014.](https://imagenes.elpais.com/resizer/v2/LBGMTGRPCFGAPH6A5OCLMGVTZI.jpg?auth=fd5bb7c200a08ed1ea61e88e1685e63c6ea63aab40b435363d44692c7c5f15be&width=414&height=233&focal=2144%2C1631)
A porous border and the river of steel: Weapons trafficked from US bleed Mexico dry
Carlos A. Pérez Ricart|
According to the most conservative studies, some 17 million weapons circulate illegally in Mexico. The vast majority come from the United States