Iran “vigorously” pursued programs to produce nuclear, chemical and biological weapons and sought help from Russia, China, North Korea and Europe, a CIA report said on Friday. “The United States remains convinced that Tehran has been pursuing a clandestine nuclear weapons program,” according to a semi-annual unclassified report to Congress on the acquisition of technology relating to weapons of mass destruction. “Iran sought technology that can support fissile material production for a nuclear weapons program,” said the report, covering the period Jan. 1 to June 30. Full Story