A federal judge has ordered former President Donald Trump to testify under oath by December 11 in the discovery phase of his $10bn defamation lawsuit against the BBC. The judge warned that failure to cooperate with questioning could lead to the dismissal of his case. The ruling also rejected Trump's lawyers' attempts to postpone questioning until January and prevent the session from being filmed. Additionally, Trump's side was given 30 days to hand over relevant documents. The lawsuit centers on a BBC documentary which Trump alleges falsely portrayed him as directly encouraging violence at the Capitol.