Who woulda thunk it? An increasingly large chorus of nations - ravaged by trafficking and violence - say it's now time to re-think international drug policy. As the corrupting power of cartels grows across Mexico and Central America, and as the body count rises, legalisation needs to be seriously discussed as an alternative to militarisation, regional leaders say. It isn't a message US President Barack Obama wants to hear when he arrives in Cartagena, Colombia, to meet 33 heads of state on April 14. --snip-- Guatemala's President Otto Perez Molina, a former general during the country’s "dirty war", came to power promising an "iron fist" against delinquency. He recently called the war on drugs a failure and  argued  that "consumption and production should be legalised" within certain limits. Juan Manuel Santos, president of Colombia, and arguably Washington's closest regional ally, has called for "a new approach" that...