Undercover US agents obtained a mysterious Russian weapon that could finally explain a baffling cluster of brain injuries ...

Undercover US agents bought a weapon from a Russian criminal gang to carry out tests on the cause of Havana Syndrome, it has been claimed.

For decades, many of the most advanced military weapons were developed in complete secrecy.

Add Yahoo as a preferred source to see more of our stories on Google. Alexei Navalny died after collapsing while taking a walk at a Siberian prison - Moscow City Court/via AP Alexei Navalny was killed ...

The last treaty between the U.S. and Russia that limited the number of deployable nuclear weapons expired on Thursday, marking the end of decades of arms control agreements between the two countries ...

Several military technological innovations have changed the course of history. From the sailing ship to the stirrup, these advances have pushed the world into new directions, and chief among them is ...

Porton Down scientists say jailed Russian dissident killed by toxin that could only have been made in state-sponsored lab ...