` ` We have identified all of the issues we need to address '' for final approval , says Ashton . The next round of talks will begin on September 17 , Iranian foreign policy chief says . U.S. State Department spokesman says talks have been ` ` constructive and useful '' Western powers suspect Iran wants to develop a nuclear weapon , a claim it denies .
`` We have identified all of the issues we need to address '' for final deal , says Ashton . The next round of talks will begin on March 17 , EU foreign policy chief says . U.S. State Department spokeswoman says talks have been `` constructive and useful '' Western powers suspect Iran wants to develop a nuclear weapon , a claim it denies .