Democratic leaders of key House committees are reigniting calling for National Security Advisor Mike Waltz to step down.

Many are raising questions about how highly sensitive information is being handled by national security officials. This ...

Learn more about Signal, including whether the news about its use in a military intelligence breach impacts its effectiveness ...

The so-called vulnerabilities mentioned regarding Signal are not with the app or its security. Instead, the issues are related to what is always the weakest link with any digital communications ...

Secure messaging app Signal has been in the spotlight this week for national-security reasons, but companies can also learn lessons from the Trump administration’s misstep.

Defenese Secretary Pete Hegseth, national security adviser Mike Waltz and more of the contacts who appeared in the Signal ...

The news of Trump officials using Signal for a group chat on military ... president or the secretary of# defense or the national security adviser,## that their phones are targeted by# some of ...

Did Defense Secretary Pete Hegseth’s messages detailing planned U.S. airstrikes in Yemen constitute a classified war plan?

Mistake.” “Glitch.” “Entirely permissible.” “Hoax.” See the varied and shifting responses President Donald Trump and his ...

It’s a more extensive use of the app than previously reported and sheds new light on how commonly the Trump administration’s national security team relies on Signal.

LITTLE ROCK (KATV) — Retired Army Colonel Marcus Jones, with a background in national security, shared his insights on the recent signal leak that has stirred public concern. "The only way it ...

Four sources tell Politico they were aware of at least 20 chat groups, all four confirmed sensitive information was discussed ...