Mexican migrants used to follow cyclical patterns of migration, working in U.S. fields, hotels, and restaurants but returning home each year to share their bounty with their families. Today, tougher border security has resulted in an increasing number of undocumented immigrants who choose to stay in the United States, rather than risk multiple, ever more arduous trips. Furthermore, tougher border security has been a boon to sophisticated, heavily armed, trans-national criminal organizations that have specialized in moving drugs, contraband, and people across the heavily fortified border. These |