As Mexico's drug violence grows, a Texas border city looks nervously south Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email As the Mexican army battles powerful drug cartels, the violence knows no borders. ( Flickr user richard masoner (cc: by-nc-sa) ) Hosted by Farai Chideya Produced by PRI and WNYC