European foreign policy chief Catherine Ashton and Iranian Foreign Minister Mohamad Javad Zarif, from left, arrive to address the media after closed-door nuclear talks in Vienna, Austria, Wednesday, April 9, 2014. (AP Photo/Ronald Zak)
European foreign policy chief Catherine Ashton and Iranian Foreign Minister Mohamad Javad Zarif, from left, arrive to address the media after closed-door nuclear talks in Vienna, Austria, Wednesday, April 9, 2014. (AP Photo/Ronald Zak)
Anna Hahner of Germany crosses the finish line to win the Vienna city marathon, in Vienna downtown, Austria, on Sunday, April 13, 2014. (AP Photo /Ronald Zak)
Thousands of athletes pass a bridge over the Danube river shortly after the start of the Vienna city marathon, in Vienna, Austria, on Sunday, April 13, 2014. (AP Photo/Ronald Zak)