Iranians wave the national flag during celebrations in Tehran on July 14, 2015, after Iran's nuclear negotiating team struck a deal with world powers in Vienna.

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Iranians wave the national flag during celebrations in  Tehran on July 14, 2015, after Iran's nuclear negotiating team struck a deal with world powers in Vienna.

Iranians wave the national flag during celebrations in  Tehran on July 14, 2015, after Iran's nuclear negotiating team struck a deal with world powers in Vienna. 

Credit:

ATTA KENARE/AFP/Getty Images

Iranians wave the national flag during celebrations in Tehran on July 14, 2015, after Iran's nuclear negotiating team struck a deal with world powers in Vienna.