By Ruxandra Guidi
http://stream.publicbroadcasting.net/production/mp3/kunm/local-kunm-973858.mp3
San Diego, CA – Forty years ago today, President Richard Nixon declared a "war on drugs." Today, drug policy represents one of the most contested issues in the U.S. and in Mexico. From the Fronteras Changing America Desk, Ruxandra Guidi has our story.