In this photo released by an official website of the Iranian supreme leader's office, supreme leader Ayatollah Ali Khamenei, addresses a group of Iranian military commanders in Tehran, Iran, Wednesday, April 17, 2013. Iran's top leader has condemned the bombing attack in Boston but at the same time charged that U.S. policies employ a double standard. (AP Photo/Office of the Supreme Leader)

Associated Press
In this photo released by an official website of the Iranian supreme leader's office, supreme leader Ayatollah Ali Khamenei, addresses a group of Iranian military commanders in Tehran, Iran, Wednesday, April 17, 2013. Iran's top leader has condemned the bombing attack in Boston but at the same time charged that U.S. policies employ a double standard. (AP Photo/Office of the Supreme Leader)
In this photo released by an official website of the Iranian supreme leader's office, supreme leader Ayatollah Ali Khamenei, addresses a group of Iranian military commanders in Tehran, Iran, Wednesday, April 17, 2013. Iran's top leader has condemned the bombing attack in Boston but at the same time charged that U.S. policies employ a double standard. (AP Photo/Office of the Supreme Leader)
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