Iran's uranium enrichment is escalation, says US

 

U.S. Warns Iran over Uranium Enrichment

The United States warned Iran to "suspend enrichment activities" (BBC) after the UN's International Atomic Energy Agency said Tehran was enriching uranium up to 20 percent at its underground Fordow plant, a level closer to producing weapons-grade uranium.

This CFR Crisis Guide traces Iran's history, its evolution as an Islamic republic, and its controversial nuclear program.