• Preliminary negotiations in Vienna over Tehran's nuclear program said to go well, even if skepticism about a long-term deal remains.

    ranian children build model centrifuges out of styrofoam and glue in a competition beneath a banner reading 'Nuclear scientists of the next generation,' as Iranians stage a mass rally to mark the 35th anniversary of the 1979 Islamic revolution on February 11, 2014 in Tehran, Iran.
    LAST UPDATE : Feb 20, 2014, 1:14 PM EST