Cannabis on the border is nothing new – for decades, weed moved north from Mexico into the U.S., an illegal trade that fueled drug cartels and drug violence. But with the legalization of recreational and medicinal cannabis in California and other U.S. states, all of that has changed. In Episode 1 of a new series from Port of Entry, we profile a Tijuana politician and activist who is pushing for legalization of cannabis in Baja California. Port of Entry is back, this time with a series of stories on how the border can change minds.