A new Russian law authorizes the creation of a state-run messaging app that is intended to decrease Moscow's reliance on ...

I called senior Pentagon officials twice and raised the issue with staff at the National Security Council. I noted it was ...

We’re overdue for a conversation about the Trump administration’s capacity to deal with what Homeland Security called a “heightened threat environment.” ...

Senators are set to meet with top national security officials Thursday as many question President Donald Trump’s decision to ...

Sources told NBC News Iran sent a communication to President Trump last week, threatening to activate sleeper-cell terror ...

The Secretary of Homeland Security Kristi Noem issued a National Terrorism Advisory System regarding a heightened threat ...

The department is working on an effort to streamline a complex set of classified networks they use with allies and partners.