Migrant encounters at the U.S.-Mexico border have reached a four-year low, but days before the U.S. election, in which immigration is a key issue, migrants continue pouring into Mexico. (AP/ Martín Silva Rey)
How Mexican cartels manage the flow of migrants on their way to the US border
Migrant encounters at the U.S.-Mexico border have reached a four-year low, but days before the U.S. election, in which immigration is a key issue, migrants continue pouring into Mexico. (AP/ Martín Silva Rey)