Earlier, when asked if he planned to attack Pyongyang, Donald Trump replied, ‘We’ll see’, and said he was holding a meeting with his military leaders. Mr Trump also tweeted that talk of appeasement was pointless because North Korea ‘only understand one thing’, as the state promised further tests. His hard-line rhetoric was prompted by Pyongyang’s announcement that it had successfully tested a weapon up to ten times more powerful than the Hiroshima bomb that could kill millions of people.