Summary: Amid a global migration surge, the trafficking industry has become a multi-billion dollar business. Mexican officials estimate as many as 6,000 people cross into Mexico every day from diverse places like Russia and Venezuela. Amna Nawaz heads south to Chiapas, Mexico where many migrants stop before continuing their journey to the U.S. border. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
