
When Mexico imposed a visa requirement on Venezuelans in January, it briefly had the desired effect: The number of Venezuelans detained at the U.S.-Mexico border plunged. But it’s now clear that it only pushed the migrants onto more dangerous clandestine routes.
Suddenly unable to simply fly to Mexico as tourists, but still desperate to leave their country, Venezuelan migrants joined others traveling over land through the dense, lawless jungle on the Colombia-Panama border.