Kim Jong Un is preparing for a high-stakes summit with US President Donald Trump in Singapore on June 12, the first such meeting between a North Korean leader and a sitting US president. The US official, who spoke requesting anonymity, was commenting on a report by South Korea's Yonhap news agency that all three of the North's top military officials were believed to have been replaced.
Kim’s motivation remains unclear but analysts said the shake-up allows him and the ruling party to tighten control over the Korean People's Army at a critical time of international engagement .