'River of guns' flowing from US to Mexico

The illegal flow of guns from the US to Mexico is made possible by the combination of Mexico's strict gun control laws and the easy access Americans have to firearms. Every year, more than 10,000 firearms found in Mexican crime scenes are traced back to the United States. Gun control activists call it the "iron river," and jt has had a devastating impact south of the border. From KPBS in San Diego, Gustavo Solis reports.