** FILE ** Iranian President Mahmoud Ahmadinejad (center) listens to a technician during his visit to the Natanz Uranium Enrichment Facility some 200 miles south of the capital, Tehran, in April 2008. (AP Photo/Iranian President's Office)
** FILE ** Iranian President Mahmoud Ahmadinejad (center) visits the Natanz uranium enrichment facility, about 200 miles from the capital of Tehran, in April 2008. (AP Photo/Iranian President's Office)
** FILE ** Iranian President Mahmoud Ahmadinejad (center) visits the Natanz uranium enrichment facility, roughly 200 miles from the capital of Tehran, in April 2008. (AP Photo/Iranian President's Office, File)
** FILE ** Iranian President Mahmoud Ahmadinejad (center) listens to a technician during his visit to the Natanz Uranium Enrichment Facility some 200 miles south of the capital, Tehran, in April 2008. (AP Photo/Iranian President's Office)
** FILE ** Iranian President Mahmoud Ahmadinejad (center) listens to a technician during his visit to the Natanz Uranium Enrichment Facility some 200 miles south of the capital, Tehran, in April 2008. (AP Photo/Iranian President's Office)
** FILE ** Iranian President Mahmoud Ahmadinejad (center) listens to a technician during his visit to the Natanz Uranium Enrichment Facility some 200 miles south of the capital, Tehran, in April 2008. (AP Photo/Iranian President's Office)
** FILE ** Iranian President Mahmoud Ahmadinejad (center) visits the Natanz uranium enrichment facility, about 200 miles from the capital of Tehran, in April 2008. (AP Photo/Iranian President's Office)
