Remarks by a top administration official appeared to be aimed at dispelling skepticism of its assertions, as President Donald ...

GENEVA (AP) — A U.S. official focusing on arms control on Monday provided what he called new, declassified details of a ...

The Air Force said the long-range flight allows engineers and weapons systems analysts to collect data on the missile’s ...

The Pentagon's counter-drone task force is set to test a high-energy laser system against drones at White Sands Missile Range ...

The launch was scheduled years in advance and was not in response to current world events, according to Air Force Global ...

Scientific knowledge about the damaging effects of nuclear-weapons testing helped to end such tests. Those findings haven’t changed.

US intelligence agencies believe that China is developing a new generation of nuclear weapons and has conducted at least one covert explosive test in recent years as part of a broader push to ...

Israel and the United States are testing new or little-known weapons in the Middle East war, including an Israeli "Sparrow" ...

The US Air Force Global Strike Command launched an unarmed Minuteman III intercontinental ballistic missile from Vandenberg ...

In September 1979, a US Vela satellite detected a mysterious "double flash" over the Indian Ocean - a signal scientists ...

Strange earthquakes have been recorded near one of the US’s most secretive nuclear weapon testing facilities, and scientists ...

Israeli Prime Minister Benjamin Netanyahu delivered on a career-long ambition to topple Iran's leadership, but his lockstep ...