FILE - In this Saturday, Feb. 3, 2007 file photo, an Iranian technician works at the Uranium Conversion Facility just outside the city of Isfahan 255 miles (410 kilometers) south of the capital Tehran, Iran. Iran is considering a more confrontational strategy at possible renewed nuclear talks with world powers, threatening to boost levels of uranium enrichment unless the West makes clear concessions to ease sanctions. Such a gambit outlined by senior Iranian officials in interviews could push Iran's atomic program far closer to Israel's "red line." (AP Photo/Vahid Salemi, File)

Associated Press
FILE - In this Saturday, Feb. 3, 2007 file photo, an Iranian technician works at the Uranium Conversion Facility just outside the city of Isfahan 255 miles (410 kilometers) south of the capital Tehran, Iran. Iran is considering a more confrontational strategy at possible renewed nuclear talks with world powers, threatening to boost levels of uranium enrichment unless the West makes clear concessions to ease sanctions. Such a gambit outlined by senior Iranian officials in interviews could push Iran's atomic program far closer to Israel's "red line." (AP Photo/Vahid Salemi, File)
FILE - In this Saturday, Feb. 3, 2007 file photo, an Iranian technician works at the Uranium Conversion Facility just outside the city of Isfahan 255 miles (410 kilometers) south of the capital Tehran, Iran. Iran is considering a more confrontational strategy at possible renewed nuclear talks with world powers, threatening to boost levels of uranium enrichment unless the West makes clear concessions to ease sanctions. Such a gambit outlined by senior Iranian officials in interviews could push Iran's atomic program far closer to Israel's "red line." (AP Photo/Vahid Salemi, File)
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