Men play backgammon in a park in Tehran June 9, 2009. Iranians vote on Friday in the 10th presidential election since the 1979 Islamic revolution which toppled the U.S.-backed Shah. Three decades after the revolution, Reuters invited some older Iranians who witnessed the Shah's overthrow to look back at the changes they have lived through. To match feature IRAN-ELECTION/REVOLUTION REUTERS/Raheb Homavandi (IRAN POLITICS ELECTIONS)