Iran has injected uranium gas into centrifuges at its underground Fordo nuclear complex in its latest step away from its 2015 nuclear deal with world powers.

Iran's president says Tehran will begin injecting uranium gas into 1,044 centrifuges, the latest step away from its nuclear deal since President Donald Trump withdrew from the accord over a year ago.

A spokesman for Iran's atomic agency says the country will break the uranium stockpile limit set by Tehran's nuclear deal with world powers in the next 10 days.

The Supreme Court has agreed to hear a challenge to Virginia's decades-old ban on uranium mining. The Supreme Court said Monday it will hear the challenge to the ban, which has been in place in 1982. 

President Obama is defending his high-stakes nuclear accord with Iran as a sign of American leadership that will make the world safer. And he says that critics of the plan should consider the alternatives.

President Obama says the U.S. has reached a "historic" agreement with Iran and if implemented, will prevent the country from producing nuclear weapons.

Diplomats say the U.S. and Iran are discussing a compromise that would let Iran keep much of its uranium-enriching technology but reduce its potential to make nuclear weapons.