Calls mount for U.S. intervention as gangs slaughter Haitian police

Read MoreChaos has taken a firm hold of Haiti’s capital, with brutal armed gangs marauding with impunity and the U.N. calling for foreign security forces to step in.Chaos has taken a firm hold of Haiti’s capital, with brutal armed gangs marauding with impunity and the U.N. calling for foreign security forces to step in.