The move is expected to increase the cost and complexity of a multibillion-dollar project that was the subject of some ...

In 1957, the U.S. Air Force began Project Pluto — a nuclear-powered cruise missile program. The result was the Supersonic Low ...

When Iran’s covert nuclear program came to international attention over two decades ago, Tehran insisted that its intentions were peaceful and that it had no plans to develop nuclear weapons.

President Donald Trump said this week that he wants the Defense Department to begin testing nuclear weapons "immediately," but experts say that's wishful thinking. The U.S. has only one location where ...

Governments kept advanced military weapons secret for decades to maintain strategic advantages over rivals, with technologies like stealth aircraft, hypersonic systems, and nuclear weapons eventually ...

President Donald Trump has called for the United States to test its nuclear weapons for the first time in three decades. But Trump’s statements about testing — in particular, whether other nations are ...

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See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A nuclear bomb map created using a simulation tool shows the ...

Nuclear weapons tests were once a regular occurrence, but most countries haven’t tested in decades, following the adoption of the Comprehensive Nuclear-Test-Ban Treaty in 1996. Now, that moratorium ...