The U.S. Secretary of State announced that no level of enrichment will be accepted for Iran!

Rubio announced a few minutes ago:

If you can enrich at any level, you can essentially reach weapons-grade enrichment very quickly.This is a fundamental fact that everyone knows, and this was the problem with the Obama agreement.But the ultimate goal here is simple: Iran must never have nuclear weapons. And the President's preference, since he does not like war, is that this goal be achieved through peaceful negotiations.