Head of the U.S. delegation, Under Secretary of State Wendy Sherman (R), and an unidentified person leave a hotel in Vienna February 17, 2014. World powers start talks with Iran on a final agreement ... more 
Head of the U.S. delegation, Under Secretary of State Wendy Sherman (R), and an unidentified person leave a hotel in Vienna February 17, 2014. World powers start talks with Iran on a final agreement on their nuclear dispute on Tuesday. If successful, the negotiations could put to rest a decade of hostility between the West and the Islamic Republic, and head off the danger of a new war in the Middle East. REUTERS/Heinz-Peter Bader (AUSTRIA - Tags: POLITICS ENERGY) less 
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Reuters | Photo By HEINZ-PETER BADER / REUTERS
Mon, Feb 17, 2014 7:42 AM EST