U.S. and Iran negotiators are in Geneva for the third round of Oman-mediated talks

In the latest turn, Trump spelled out what he called the Islamic Republic’s “sinister nuclear ambitions” Tuesday night.

Iran accuses Trump of lying in his State of the Union about the country's nuclear ambitions, as the next round of bilateral talks looms.

North Korean leader Kim Jong Un promised to strengthen his country’s nuclear weapons program on Wednesday, before presiding over a nighttime military parade, accompanied by his daughter.

Last week, Trump gave Iran 15 days to cut a deal that would prohibit Iran from enriching uranium. Iranian Foreign Minister Abbas Araghchi refused, saying the country has the right to a nuclear program, which he says is for peaceful purposes.

President Trump is pressuring Iran to either curtail its nuclear program or face military strikes, after Iran amassed a large stockpile of highly enriched uranium. Here's what to know.

The ten nuclear developers working under a U.S. federal program to accelerate the deployment of small modular reactors are making progress toward their July 4 target date, with at least six already building their pilot projects.