Will Iran Give Up Twenty Percent Enrichment? Federation of American Scientists (FAS), July 22, 2010

Since February, Iran has been enriching uranium to concentrations of 20 percent U-235. This is a troubling development because a stockpile of 130 kg or so of 20 percent enriched uranium would reduce by more than
half Iran’s time to a bomb. This possibility understandably worries the major powers and escalates tensions. Continuing 20 percent enrichment calls into question all approaches to a resolution of the Iranian nuclear issue. A key unknown is whether Tehran will stop the higher enrichment and, if so, under what circumstances.