Hassan Rouhani
Iran announced it has begun using advanced centrifuges to enrich uranium.
Donald Trump had said Monday at the G-7 that there's a "really good chance" that he and Hassan Rouhani could meet to discuss their nuclear impasse.
European leaders have struggled to calm the deepening confrontation between Iran and the United States since Trump pulled out of the 2015 nuclear deal.
The new threat comes days after President Hassan Rouhani said the nation could push its uranium enrichment level to "any any amount we want."
WHAT'S HAPPENING
A diplomatic conflict between Tehran and Washington has flared since the U.S. pulled out of the 2015 Iranian nuclear deal.
President Hassan Rouhani threatened to do more if world powers didn't protect Iran from the impact of U.S. sanctions.
One year after threatening North Korea before the General Assembly, the U.S. president targets Iran.
President Hassan Rouhani claimed an unnamed U.S.-allied country was behind Saturday's attack.
Trump announced Monday that he would meet "anytime" with Iranian President Hassan Rouhani with "no preconditions."
But it's music to the ears of foreign policy hawks like John Bolton and Lindsey Graham.