New Delhi, Oct 06 (ANI): US President Barack Obama has said that Iran is still 'a year or more away' from building a nuclear weapon. Obama's statement, which he quoted from US intelligence assessments, comes as a sharp contrast with Israel, which said that Iran is just months away from being able to build a bomb. However, Obama admitted that the American intelligence estimates are 'more conservative' than those of Israel, although he warned Israel President Shimon Peres to be wary of 'any kind of talk' from Iran after Israel dismissed Iran's outreach to US. Obama also said that the world must 'test' whether Iranian President Hassan Rouhani is serious about resolving its nuclear dispute diplomatically, although he insisted that the US would not take a 'bad deal' from Iran.