A Houthi missile expert was tracked with the help of an Israeli human source in Yemen.

The directive targets communications in a Signal chat with top intelligence and national security officials between March 11 ...

The entire nation, it seems, is talking emojis after they appeared in a high-level Signal message chat: 👊🏴🔥 ...

As the president has made it very clear, Mike Waltz continues to be an important part of his national security team. And this ...

Democrats on the House Intelligence Committee on Monday requested an independent assessment into Trump administration ...

mistakenly invited him into the chat on Signal, a publicly available encrypted messaging app. Goldberg shared screenshots ...

Massive OPSEC fail from the side who brought you 'lock her up' Senior Trump administration officials used the messaging app ...

National security adviser, Mike Waltz, inadvertently added Jeffrey Goldberg, the editor of The Atlantic magazine, to a group ...

Officials were crisscrossing the world as they sent and received sensitive messages on Signal about an imminent U.S. attack ...

House Oversight and Government Reform Committee Democrats are asking the inspectors general at national security agencies ...

Secretary of State Marco Rubio was far less chatty than other officials in the controversial Signal discussion on U.S. airstrikes in Yemen.

How did The Alantic magazine's editor wind up in a group chat where officials discussed imminent airstrikes? The Trump team's explanations clash.