US intelligence agencies believe that China is developing a new generation of nuclear weapons and has conducted at least one ...

The Pentagon and the Energy Department have airlifted a small nuclear reactor from California to Utah, demonstrating what they say is the potential for the U.S. to quickly deploy nuclear power ...

President Donald Trump is doubling down on his trade war, plunging US companies, consumers and trade partners into fresh uncertainty. Follow for live updates.

A new Army organization aims to meld service leaders’ mandates to cut bureaucracy and adopt a venture-capital mindset with their push to turn soldiers’ ideas into manufactured gear.

The gambit was successful. At least twice, the president weighed ordering an attack on Iran, only to be dissuaded by aides ...