Trump is now offering assurances that U.S. troops won’t be sent to help defend Ukraine against Russia after seeming to leave ...

Monday’s conviction was the first for spying in New Zealand’s history. The soldier's name was suppressed, as was what country ...

There was little concrete progress Monday on the obstacles to ending the war — a deadlock that likely favors Russian ...

The event drew participants from U.S. industry and allied nations to consider what technologies might be needed to operate in ...

Opinion: Washington has underinvested in air and missile defense for too long and is now facing the consequences.

Outer space has emerged as the world's next battlefield, demonstrated by recent cyberattacks on satellites blamed on Russia.