As the cloud cleared, Air Force bombers dropped in to gather air samples. Researchers hoped that the radioactive fallout ...

FILE PHOTO: U.S. Energy Secretary Chris Wright holds a press conference on the sidelines of the International Atomic Energy Agency (IAEA) General Conference in Vienna, Austria, September 15, 2025.

WEST PALM BEACH, Fla. (AP) — New tests of the U.S. nuclear weapons system ordered up by President Donald Trump will not include nuclear explosions, Energy Secretary Chris Wright said Sunday. It was ...

In 1961, the Soviet Union detonated the most powerful nuclear weapon ever built. Known as Tsar Bomba, the explosion was over ...

The Soviet Union built the largest nuclear weapon ever detonated, but just before its test, engineers deliberately reduced ...

During the Cold War the U.S. considered putting nuclear weapons on balloons and letting them float into enemy territory for a ...

A pair of lawmakers exhorted the Energy Department's top official to consider reining in a major nuclear arsenal modernization program amid long-running concerns over its cost and schedule performance ...

Was President Trump’s recent directive to resume U.S. nuclear testing — after a hiatus of 33 years — an actual policy decision? Or was it a political stunt to project toughness? His surprise ...

One expert says explosive nuclear testing would be 'alarming.' President Donald Trump announced on Wednesday that he is ordering the United States to resume nuclear testing, leaving experts wondering ...

WEST PALM BEACH, Fla. (AP) — New tests of the U.S. nuclear weapons system ordered up by President Donald Trump will not include nuclear explosions, Energy Secretary Chris Wright said Sunday. It was ...