Acting NASA Administrator Sean Duffy has directed the agency to fast-track plans to put a nuclear reactor on the moon.
The Lawrence Livermore National Lab is beginning to publish thousands of films of U.S. nuclear weapons tests. The images are both frightening and fascinating.
World leaders declared progress in safeguarding nuclear materials sought by terrorists and wayward nations, even as President Barack Obama acknowledged the task was far from finished.
The U.S. ambassador to the United Nations is calling on the U.N. Security Council to hold North Korea accountable "by imposing a tough, comprehensive and credible package of new sanctions" in response to that country's announced nuclear test.
Environmental officials are monitoring the Hudson River near the Indian Point nuclear power plant after a weekend transformer fire that spilled at least 15,000 gallons of oil into the river.
The US has brought first-of-its kind cyber-espionage charges against five Chinese military officials accused of hacking into U.S. companies to gain trade secrets.