ISTANBUL A North Korean nuclear complex has been undergoing "modernization and expansion" throughout this year, a recent report by a US website monitoring the reclusive state said. "Commercial satellite imagery of North Korea's Yongbyon Nuclear Scientific Research Center from October and November 2025 shows continuation of modernization and expansion efforts throughout the site," said the report by 38 North. "Yongbyon plays a critical role in the country's production of nuclear material for its