South Korea nuclear operator runs drill after alleged hacker threat

South Korea’s state-run nuclear power plant operator said it started a two-day drill on Monday to prepare for a potential cyberattack, after a series of online document leaks caused increasing security concerns.The stolen documents include blueprints of climate control systems, floor plans, software program manuals and personal information of employees. The leaked documents, however, do not have classified information and pose no threat to the safety of the nuclear plants, said Korea Hydro