North Korea nuclear weapons top of US Secretary of State’s agenda in Beijing

US Secretary of State Rex Tillerson has arrived in Beijing for his first face-to-face talks with Chinese leaders expected to focus on North Korea’s nuclear programme and trade.
Mr Tillerson’s visit followed his remarks in South Korea on Friday in which he warned that pre-emptive military action against North Korea might be necessary if the threat from their weapons programme reaches a level "that we believe requires action".