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

Hungary will block a planned 90-billion-euro ($106-billion) European Union loan to Ukraine until the flow of Russian oil through the Druzhba pipeline resumes, Hungary's foreign minister said.

Former British Prime Minister Johnson says the U.K. and its European allies should immediately deploy noncombat troops to Ukraine to show Vladimir Putin that Western nations are committed to the nation's freedom and independence.

Former British Prime Minister Boris Johnson says the U.K. and its European allies should immediately deploy noncombat troops to Ukraine to show Vladimir Putin that Western nations are committed to the nation's freedom and independence.

President Donald Trump said Saturday that he was raising the global tariff he wants to impose to 15%, up from 10% he had announced a day earlier.

Homeland Security Secretary Kristi Noem made comments that could lead people to misinterpret her agency's role in elections as she lobbied for legislation that would require photo ID to vote and documentary proof of citizenship for voter registration ...

Organizers of the 2026 Milan Cortina Games pledged that virtually all of the electricity to power the Winter Olympics would be clean.

Five European nations have announced a new program to produce low-cost air defense systems and autonomous drones using Ukrainian expertise hard-won over the past four years of war against Russia.

The U.S.-China relationship affects national security and our pocketbooks. They are the world's most advanced militaries and largest economies. Now, China's increasingly authoritarian leadership is purging officials while portraying itself as more .. ...

This will come as a surprise to no one, but exercise is really good for us. But why it works and how it works are far less understood. Horizons moderator William Brangham explores that with Stanford University's Euan Ashley. He's a professor of ...