Dick Cheney, US vice president, has underlined Washington’s hopes for greater efforts by China to end North Korea’s nuclear weapons programme by presenting Beijing leaders with new evidence suggesting Pyongyang has already built some atomic bombs. “Time is not necessarily on our side … We think it’s important to move forward aggressively,” Reuters news agency quoted a senior US official as saying after talks between Mr Cheney and top Chinese leaders in Beijing on Wednesday. However, China gave no hint of any significant change to its strategy toward its reclusive communist neighbour, or that Mr Cheney’s visit had achieved any narrowing of Sino-US differences over Taiwan. Over the past year Beijing has been markedly more active in its efforts to defuse tensions surrounding North Korea, hosting multilateral talks and pushing its old ally to attend.Full Story