Cartels and smuggling networks on the U.S.-Mexico border are growing more sophisticated, bracing for a historic surge of illegal immigration this spring.Cartels and smuggling networks on the U.S.-Mexico border are growing more sophisticated, bracing for a historic surge of illegal immigration this spring. WATCH: Evidence Of Cartels' Wristband ‘Inventory System’ For Illegal ImmigrantsThe bands are put on migrants’ left wrist at stash houses in Mexico, just across the border, before the groups come into the U.S., Jones told The Federalist. The bands all have numbers linked to a database of personal information: name, phone number, destination in the U.S., and...