South Korea's impeached President Yoon Suk Yeol has been charged with insurrection after he attempted to declare martial law in December. His ill-fated attempt to impose military rule plunged the country into an unprecedented political crisis and he becomes the first sitting president in South Korean history to be charged with a crime. The indictment comes after a court in Seoul rejected a request to extend Yoon's detention on Saturday, which meant prosecutors had to make a decision on whether to charge or release him before Monday.