ROMNEY:US AS A MORAL DUTY TO BLOCK IRAN NUCLEAR WEAPONS US Republican presidential candidate Mitt Romney has said his country has a "moral imperative" to stop Iran from developing nuclear weapons. Mr Romney, speaking during a visit to Jerusalem, said Iran was the most destabilising country in the world. He said the US recognised Israel's right to defend itself and that it wasright for the US to stand with Israel. Mr Romney also referred to Jerusalem as Israel's "capital" - senior Palestinian officials said this was "unacceptable". In his speech in front of Jerusalem's Old City, Mr Romney said Iran's leading ayatollahs were "testing our moral defences". "They want to know who will object and who will look the other way. We will not look away nor willour country ever look away from our passion and commitment to Israel." He said Iran was "the most destabilising nation in the world" and that the US had "a solemn duty and a moral imperative to deny Iran's leaders the means to follow through on their malevolent intentions". 'All measures' Earlier, one of Mr Romney's top advisers, Dan Senor, had said the presidential candidate would respect any decision by Israel to usemilitary force against Iran. US President Barack Obama has focused on using sanctions to contain Iran's nuclear ambitions. It may not convert any new voters but this election is all about firing up likely supporters, exciting them and making sure they turn out to vote”