Iran says it's enriching uranium to 60% - What's going on with the Iran nuclear talks?

London — Iranian and U.S. negotiators resumed talks in Vienna on Thursday that could eventually resurrect the nuclear deal struck back in 2015. But as Iran continues to walk even further away from the terms of the agreement with advances in its uranium enrichment program, that's a big could.

President Joe Biden's administration wants to reverse his predecessor's unilateral withdrawal from the agreement, 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%.