Summary

The number of illegal immigrants in the United States is increasing, many of them children. Many come from Central America, as Enrique did, to find their mothers. Mexico has become more dangerous. In 2002, El Tirindaro's body turns up in Nuevo Laredo, one of 57 murders that year. He was tortured and shot execution style. The city is in the hands of a drug-trafficking cartel. They even kill police officials and journalists who get in their way.

The 2012 upturn in the United States economy attracted even more immigrants. Though the number of adults is at a 40-year low, the number of children is up. New laws have aimed at making life more difficult for illegal immigrants, the government hoping they will leave on their own.

Immigrants are willing to do difficult jobs for low wages and no benefits. Employers say they often work harder than citizens...