The discovery of 72 murdered migrants in Mexico last week has directed international attention to a country in the grip of a violent war between competing drug cartels. The Real News Network speaks to investigative journalist, Bruce Livesey, who recently returned from Mexico. Livesey says that the reasons behind the violence in Mexico are complicated. But among them he highlights the role of the North American Free Trade Agreement (NAFTA), which fueled the drug trade in two ways....