The West cannot stop Iran from building nuclear weapons, the country's supreme leader has said. Ayatollah Ali Khamenei was speaking on Sunday as tensions continue to mount over the country's nuclear work. In words reported by state media, he said: "Talks about Tehran's nuclear weapons is a lie and [the West] know it. "We do not want nuclear arms based on our beliefs, otherwise they would not have been able to stop it." A deal with the West over the nuclear programme is possible, the supreme leader said, but only if Tehran can keep its nuclear infrastructure intact. He said:...