Iran says it's enriching uranium to 60% - What's going on with the Iran nuclear talks? By Elizabeth Palmer Iran blaming Israel for attack on nuclear facility could. This week, Iran ramped up its uranium enrichment program in yet another breach of the agreement, which, with the U.S. having quit and Iran breaking multiple rules, is now barely alive. President Joe Biden's administration wants to reverse his predecessor's unilateral withdrawal from the nuclear deal, but the process was always going to be delicate. Sunday's attack on Iran's nuclear facility in Natanz complicated things even further. Iran responded to what it called an act of "nuclear terrorism" by Israel with the announcment that it would start enriching uranium to 60% purity — a big step up from its current maximum of 20%.