After nearly four decades as Cambodia’s strongman leader, Prime Minister Hun Sen announced on Wednesday that he will step down in a matter of weeks to make way for his successor and son, Hun Manet, the country’s army chief. [time-brightcove not-tgx=”true”] Hun Sen, 70, announced his departure during a news conference in Phnom Penh, marking the start of a close to a 38-year premiership that made him Asia’s longest ruling leader.