** FILE ** In this Monday, April, 9, 2007, file photo Iranian President Mahmoud Ahmadinejad, speaks at a ceremony in Iran's nuclear enrichment facility in Natanz, 300 Kilometers (186 miles) south of capital Tehran, Iran. (AP Photo/Hasan Sarbakhshian, File)
A satellite image provided by DigitalGlobe and the Institute for Science and International Security shows the military complex at Parchin, Iran, about 19 miles southeast of Tehran, in August 2004. (AP Photo/DigitalGlobe and the Institute for Science and International Security) ** FILE **
** FILE ** Iranian technicians work with foreign colleagues at the Bushehr Nuclear Power Plant outside the southern port city of Bushehr, Iran, in this photo from Nov. 30, 2009, released by the semiofficial Iranian Students News Agency. (Associated Press/Iranian Students News Agency)
Iranian security forces stand guard around the site of an explosion that killed Mostafa Ahmadi Roshan, a chemistry expert and a director of Iran's Natanz uranium enrichment facility, in Tehran on Wednesday, Jan. 11, 2012. (AP Photo/International Iran Photo Agency, Sajjad Safari)
** FILE ** U.S. citizen Amir Mirzaei Hekmati, convicted by Iran of spying for the CIA, is pictured on a video frame grab image made from the Iranian broadcaster IRIB TV on Tuesday, Dec. 24, 2011. (AP Photo/IRIB)
During a military parade in Tehran, a member of Iran's Revolutionary Guards looks at a Shahab-3 missile, which can be mounted with a nuclear payload and can reach Israel, Iran's arch foe. (AP Photo/Hasan Sarbakhshian)
** FILE ** Iranian technicians work at the Bushehr nuclear power plant, outside the southern city of Bushehr, Iran, on Monday, Aug. 23, 2010. Iran's nuclear chief said on Tuesday Nov. 23, 2010, that a malicious computer worm known as Stuxnet had not harmed the country's atomic program and accused the West of trying to sabotage it. Iran earlier confirmed that Stuxnet had infected several personal laptops belonging to employees at the Bushehr plant but that plant systems were not affected. (AP Photo/International Iran Photo Agency, Ebrahim Norouzi)
FILE - This Sept. 21, 2008, file photo shows Iranian basij paramilitary volunteers, affiliated to the elite Revolutionary Guard, attending a parade ceremony, marking the 28th anniversary of the onset of the Iran-Iraq war (1980-1988), in front of the mausoleum of the late revolutionary founder Ayatollah Ruhollah Khomeini, just outside Tehran, Iran.
Iranian President Mahmoud Ahmadinejad visits a uranium-enrichment facility about 200 miles south of Iran's capital, Tehran, in April 2008. (Associated Press)
** FILE ** This 2009 file photograph, originally released by Iran's semi-official Fars News Agency, purports to show the launch of a Shahab-3 medium-range missile at an undisclosed location in Iran. (Associated Press)
Israeli Prime Minister Benjamin Netanyahu made it clear in a meeting with President Obama that his intent to engage in the peace process is predicated on actions by Palestinians as well as U.S. actions on Iran.
An Iranian girl and women react as they attend a religious procession to mark Ashura in Ardebil, Iran, in 2009.
(AP Photo/Hasan Sarbakhshian)