Former President Jean-Bertrand Aristide returned to Haiti on Friday after a nearly a month in Cuba, thrilling hundreds of supporters who gathered at the airport at a time of tensions over the recent assassination of the country’s leader. Aristide, a charismatic yet divisive figure in Haiti who was receiving unspecified medical treatment in Cuba, arrives back in a country simmering with tension over the July 7 assassination of President Jovenel Moïse as new details about the investigation emerged.