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US Secretary of State John Kerry (L) holds a meeting with Iran's Foreign Minister Javad Zarif (R) over Iran's nuclear program in Lausanne on March 17, 2015. Also at the negotiating table are US Secretary of Energy Ernest Moniz (2nd L) and the head of the Atomic Energy Organization of Iran Ali Akbar Salehi (R). AFP PHOTO / POOL / BRIAN SNYDER (Photo credit should read BRIAN SNYDER/AFP/Getty Images)