this is bbc news, the headlines: president biden has used his first address at the united nations general assembly to promise a new era of " relentless diplomacy" instead of " relentless wa r". mr biden said that battling climate change and coronavirus will not be defeated by a force of arms, or a new cold war. an earthquake has struck the australian state of victoria, causing significant damage to buildings. the epicentre was in the regional town of mansfield, about 180 kilometres north east of melbourne. hundred of people have been evacuated. emergency services say tremors were felt as far away as sydney in new south wales. pakistan's prime minister, imran khan, has been talking to the bbc about the taliban takeover in afghanistan. he said neighbouring countries would make a collective decision about whether or not to recognise the new government.