The U.S. says it's pausing participation on a joint board with Canada for continental defense that dates to World War II.

On a cloudy day in late March, Isaiah Taylor, the 27-year-old founder and chief executive of Valar Atomics, a Hawthorne, Calif.–based nuclear energy startup, led me into a large black tent at the Utah ...

When atmospheric chemists Paul Crutzen and John Birks added smoke into their computer models of nuclear war scenarios, they ...

Diplomats have gathered in New York to review the future of the global nonproliferation regime, while Washington and Tehran ...

Commonwealth Fusion Systems took another step this week in its race to become the first to get the same power fueling the sun ...

When the start-up Fermi America announced plans to build the Donald J. Trump Advanced Energy and Intelligence Campus near Amarillo, Texas, last year, investors clamored for a chance to cash in on the ...

America was built on a radical premise: that individual liberty is an unalienable, inherent right worth fighting for in the face of tyranny. Revolutionary at the time of our founding, this idea ...

Secretary of State Marco Rubio said Iran's nuclear ambitions remain the central issue in any negotiations. In an interview on FNC's "Special Report," Rubio said that Tehran already uses the Strait of ...

SALT LAKE CITY — Sen. Mike Lee called for an end to the Senate filibuster on Saturday if Senate rules are not changed to require in-person Democrat opposition to stop a vote on his SAVE America Act.

Among the many points of disagreement between Iran and the U.S. during the current conflict is the fate of Tehran’s highly enriched uranium (HEU): some 972 pounds of up to 60 percent enriched uranium, ...

Cincinnati police request help identifying suspect in fatal hit-and-run Cincinnati police requested the public's help in identifying the suspect in a fatal hit-and-run that left one man dead. Man in ...

As the United States marks its 250th anniversary, WTOP presents “250 Years of America,” a multipart series examining the innovations, breakthroughs and pivotal moments that have shaped the nation ...