Iran and world powers locked horns in an intense second day of nuclear talks Thursday, with Tehran saying "no progress"...
Pentagon chief Chuck Hagel on Friday acknowledged "troubling lapses" among troops managing the country's nuclear arsenal and warned their job...
Iranian Foreign Minister Mohammad Javad Zarif on Tuesday denied US claims that the Islamic republic had scuttled nuclear talks in...
The United States plans to spend billions to upgrade a decades-old atomic bomb designed to stop a Soviet invasion of...
North Korea on Monday warned of "merciless firing" against the South if it goes ahead with a reported plan to...
A US think tank Friday disputed a study that North Korea's nuclear program was developing beyond the world's ability to...
The potential for terrorist use of chemical agents is a noted concern highlighted by the Tokyo sarin gas attacks of...
Syria rebels possess ground-to-ground missiles and sarin, and a UN report on chemical weapons use shows they carried out attacks...
The United States provided Iraq with intelligence on preparations for an Iranian offensive during the Iran-Iraq war even though it...
It is not a scene one would wish to envision: an explosion in an American town, with the emergency response...