TEHRAN, IRAN - DECEMBER 07: A woman looks at books as Iranians walk and shop along Vali Asr Avenue on December 7, 2013 in Tehran, Iran. US led sanctions over Iran's disputed nuclear program have helped cripple Iran's economy in recent years. Iran agreed last month in Geneva to an interim deal with six world powers to halt the advance of its nuclear program in return for the US and its allies lifting some of their existing sanctions. (Photo by Scott Peterson/Getty Images)
