The Drug War Moves to Central America

As the drug war continues, the Obama Administration has tried to emphasize prevention and treatment here in the US, to reduce the demand that fuels so much deadly violence south of the border. In the meantime, Mexico's outright warfare against drug cartels has caused the drug dealers to move further South into Central America, where the homicide rate now leads the world. What is the US doing to stop the demand for heroin, cocaine and methamphetamine? Why are Central American leaders calling for legalization?