The flag of the International Atomic Energy Agency IAEA flies in front of its headquarters during a board of governors meeting in Vienna

EU

The flag of the International Atomic Energy Agency (IAEA) flies in front of its headquarters during a board of governors meeting in Vienna November 28, 2013.

The flag of the International Atomic Energy Agency (IAEA) flies in front of its headquarters during a board of governors meeting in Vienna November 28, 2013. REUTERS/Heinz-Peter Bader

Iran preparing to start plant needed for interim nuclear deal: sources