Russian officials say they are waiting for an explanation from President Donald Trump about nuclear testing. He hasn't given ...

Energy Secretary Christopher Wright clarifies U.S. nuclear testing plans, confirming no explosive detonations but systems ...

Energy Secretary Chris Wright said the testing ordered up in a surprise announcement by President Trump last week would focus ...

The Energy Department and Air Force in August successfully carried out the first tests dropping unarmed B61-12 nuclear ...

The U.S. hasn’t tested the explosion of a nuclear weapon since 1992, when President George H.W. Bush ordered a moratorium.

A Pakistani official told CBS News that the country "will not be the first to resume nuclear tests" in response to President ...

After his recent remarks about resuming nuclear testing, President Trump told "60 Minutes" "we're the only country that doesn ...

President Trump has argued the U.S. should test nuclear weapons because other countries are doing it. But scientific data suggest they’re not.

After the president called for resuming nuclear testing “immediately,” the official said the administration is planning only ...

Energy Secretary Chris Wright says that new tests of the U.S. nuclear weapons system ordered up by President Donald Trump ...