The U.S. signed a nuclear deal with Saudi Arabia, which is a major shift in policy. Could it spark a dangerous regional arms race, including with Iran?

The previous supreme leader, who was killed early in the war, had renounced nuclear weapons. U.S. spy agencies believe his son is more interested in building a bomb.

Israeli Prime Minister Benjamin Netanyahu has claimed that Iran would have developed a nuclear weapon and used it on Israel were it not for the two wars of the past year.

The Saudi deal stoked surprise and immediate concern across Washington, as well as in Israel, itself a nuclear power that has long feared an atomic arms race could grip the region.

The U.S. has reviewed the assessment, and President Trump has threatened to attack the site.

The timing of helping Saudi Arabia build nuclear power plants has renewed concerns among some lawmakers and analysts about whether allowing more countries to development enrichment programs could lead increase the long-term risks of

President Donald Trump said one of the main objectives was to prevent Iran from building a nuclear weapon. That has put a focus on Iran’s stockpile of uranium and its program to convert this naturally occurring element into material that can sustain a nuclear reaction — a process called enrichment.

Iran has faced suspicion for decades over its nuclear ambitions and whether it’s developing the capability to build an atomic weapon. While the Islamic Republic has always maintained that its nuclear program is peaceful and for energy purposes,

Here's what to know about the U.S. and Saudi nuclear pact allowing American companies to build uranium enrichment facilities.