The attack came as a Ukrainian delegation was set to meet with America’s top diplomat in Saudi Arabia about ending the three-year war with Russia.

In 1985, an ailing solar observation satellite in orbit over 300 miles above the Earth was the target of a United States Air ...

Thirty-four senior officials detail government secret-keeping around UFOs, in the explosive documentary "The Age of ...

The life and work of Frank Wisner, one of the CIA’s founding officers, offers us a portrait of American intelligence’s ...

No doubt Elon Musk was appalled at Mark Kelly's tweets in which he criticized the administration for its disjointed, policy ...

Billionaire blames ‘IP addresses from the Ukraine area’ for social media platform going down, and gets into a public fight ...

The history of the fighter jet has dominated the 20th century. See how they've evolved from rudimentary experiments to ...

At the heart of NATO, the world’s longest-standing security alliance, is the notion that an attack on one is an attack on all ...

WASHINGTON (AP) — President Donald Trump on Thursday expressed uncertainty that NATO would come to the U.S.’s defense if the ...

This decision won’t just benefit our national security. It will boost our economic security too, bringing investment and ...

Being the actual designated survivor brings extra adrenaline jolts and humbling thoughts about being unwittingly catapulted ...

The United States must rebuild and replace its Cold War–era nuclear deterrent, given the growing threats posed by the autocrats in Beijing, Moscow, Pyongyang, and Tehran.