Venezuelans were subjected to a visa requirement by Mexico in January, which temporarily had the anticipated result: a sharp decline in the number of Venezuelans detained at the U.S.-Mexico border. But it's now obvious that it did nothing more than force the migrants into riskier underground routes.
Venezuelan refugees joined others making their way across land through the deep, dangerous jungle on the Colombia-Panama border after finding themselves unexpectedly unable to just fly to Mexico as tourists but yet desperate to leave their nation.