The U.S. has not conducted a nuclear test in over 30 years. Experts say doing one now could make America less safe.

President Donald Trump’s announcement of resuming nuclear testing has stirred questions about the type, such as live testing ...

A nationwide test of emergency alert systems is scheduled for early October. Although it is only a routine test of systems designed to inform the public about incoming threats, the alerts can still be ...

New tests of the U.S. nuclear weapons system ordered up by President Donald Trump will not include nuclear explosions, Energy Secretary Chris ...

A test of the nation’s Emergency Alert System and Wireless Emergency Alerts will occur on Wednesday at 11:20 a.m. Arizona time, according to the Arizona Emergency Information Network. The test will ...

An incredible image buried deep in an annual military report released last month shows the U.S. Navy test-firing a high-powered laser weapon at a drone target from one of its warships. The photo of ...

What is Russia's doomsday missile and Khabarovsk? Russia has launched the nuclear-powered submarine Khabarovsk. It will carry the Poseidon underwater drone, known as the “doomsday missile.” The launch ...