Former national security adviser Mike Waltz was photographed using a Signal-like messaging app during Wednesday’s Cabinet meeting, more than a month after he first came under intense scrutiny for ...

A screengrab of a page from a Pentagon-wide memo warning against using the messaging app Signal. Several days after top national security officials accidentally included a reporter in a Signal chat ...

A Pentagon-wide advisory went out one week ago warning against using the messaging app Signal, even for unclassified information. "A vulnerability has been identified in the Signal messenger ...

Earlier this week, The Atlantic‘s editor-in-chief Jeffrey Goldberg revealed in a startling piece that he’d accidentally been added to a group chat on Signal between key national leadership including ...

A Pentagon-wide advisory that went out one week ago warned against using Signal, the messaging app, even for unclassified information. Several days after top national security officials accidentally ...