A new leadership is appointed in Haiti as gangs threaten to overthrow the government

PORT-AU-PRINCE, Haiti — A wealthy businessman on Thursday became the head of Haiti’s transitional presidential council tasked with restoring order in the troubled country as a top gang leader underscored the challenges facing the nation by vowing to overthrow the government. Laurent Saint-Cyr’s appointment at the council’s heavily guarded office in the capital, Port-au-Prince, where criminal gangs control 90% of the neighborhoods