The U.S. Navy carried out four scheduled unarmed missile tests of the Trident II D5LE off the coast of Florida last week.

SAN CLEMENTE, Calif. (KABC) -- Sirens went off three times between 10 a.m. and noon Wednesday in the San Onofre area, possibly the final drill from the San Onofre Nuclear Generation Station, as the ...

U.S. President Donald Trump on Sunday said Russian President Vladimir Putin's offer to voluntarily maintain limits for a year ...

Vladimir Putin warned that Russia would conduct a nuclear test if another power did, citing signs of preparations from some ...

Russia nuclear test: For the first time in more than three decades, Russia may be preparing to resume nuclear bomb testing, a move that has sent ripples of concern across the globe. Military expert ...

Iran has likely carried out an undeclared missile test at its Imam Khomeini Spaceport, according to satellite photos analyzed ...

Russia offered Monday to keep abiding by the nuclear warhead limits in a key treaty with the United States once it expires in February, but only for one year and if Washington did the same. The New ...

The U.S. Department of Energy said on Tuesday it has made an initial selection of 11 projects for a pilot program seeking to develop high-tech test nuclear reactors and get at least three of them to ...

North Korea has conducted a sixth nuclear test, the Japanese government said, a move the United States and its allies in the region are likely to view as a major provocation. Seismological data from ...