WASHINGTON - President Barack Obama will bring the US negotiating team back from Vienna if talks over Iran's nuclear program, which have already been extended several times beyond successive self-imposed deadlines, do not appear to be constructive, a White House spokesman said on Thursday. 'The fact that we've been very clear about our expectations for a final agreement makes it unlikely that the talks will drag on for many more weeks. But, again, I wouldn't speculate on the outcome,' said spokesman Josh Earnest.
