In response to massive migration of Central Americans through Mexico en route to the U.S., Mexican President Enrique Peña Nieto unveiled the Southern Border Program. The aim was ostensibly to protect the human rights of migrants, often subject to extortion by immigration officials and organized crime, and promote regional development and security. Critics say little has changed and that deportations of Central American migrants are up 70% in the past year. Clayton Conn reports from Mexico City. teleSUR