The road to Mexico goes through the United States for Mexican . The journey is `` one of the most dangerous in the world , '' rights group says . Thousands of migrants are abused each year by smugglers and drug cartels . Human smuggling may be a 15 business in Mexico .
The road to the United States goes through Mexico for Central Americans . The journey is `` one of the most dangerous in the world , '' rights group says . Thousands of migrants are abused each years by smugglers and drug cartels . Human smuggling may be a $ 20 billion business in Mexico .