Authorities in Haiti have ordered a nighttime curfew after an explosion of violence when gang gunmen overran the two biggest prisons and freed thousands of inmates over the weekend. A 72-hour state of emergency began Sunday night. The government said it would set out to find the killers‚ kidnappers and other criminals who fled. “The police were ordered to use all legal means at their disposal to enforce the curfew and apprehend all offenders‚” said a statement from Finance Minister...