Iranian presidential candidates
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Iran after Ahmadinejad: The election in 45 seconds

16 July 2013 Last updated at 14:21 BST

Iran's 2009 presidential election prompted mass protests against the disputed re-election of Mahmoud Ahmadinejad - and a violent crackdown against the crowds.

With the controversial president now heading out of office after reaching his two-term limit, Iranians have gone to the polls once again.

But what will this election mean? Does the president hold any real power, or does the clerical establishment still run Iran?

The BBC's James Reynolds explains all, in just 45 seconds.