Ten Mexican students were killed on Sunday after stopping at a checkpoint run by drug traffickers in the state of Durango. The dead included three girls, ages eight, eleven and thirteen; the rest were all teenagers except for a twenty-one-year-old. The students were on their way to receive government scholarships as part of a federal program called “Opportunities” that supports low-income students. The killings are believed to have been carried out by the Zetas, one of the largest drug cartels in Mexico. The Zetas was formed by former Mexican soldiers who were trained by the United States in the mid-1990s at the School of the Americas in Fort Benning, Georgia.