Envoys for Iran and the United States have engaged in four rounds of talks. But exactly what a deal would look like remained ...

Greenhouse-gas emissions get all the attention, but their effect is manageable and unfolds over decades.

Nuclear waste and radioactive plutonium would be assessed as a fuel for reactors under a draft executive order being ...

"We're in very serious negotiations with Iran for long-term peace," President Donald Trump said on a tour of the Persian Gulf ...

ABU DHABI, United Arab Emirates (AP) — President Donald Trump said Thursday that the United States and Iran have “sort of” ...

After initially teasing that he may jet off to Istanbul for the Ukraine-Russia peace talks, Trump threw water on the matter ...

Wall Street is veering lower while oil prices are down more than $2 a barrel as traders bet on a possible U.S.-Iran nuclear ...

The fast-moving conflict between India and Pakistan last week demonstrated the inherent dangers of the modern nuclear age.

US President Donald Trump said on Thursday that Washington is “very close” to reaching a nuclear deal with Iran after Tehran ...

U.S. President Donald Trump said on Thursday that the United States was getting very close to securing a nuclear deal with ...

President Donald Trump suggested the US is nearing an agreement to curb Iran’s nuclear activities, telling business leaders ...