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 ...

Signal is back in the headlines, but this time it’s not for a security breach, but rather a high-profile example of how it’s designed to work. Recent news highlighted an incident where classified ...

Add Yahoo as a preferred source to see more of our stories on Google. Former national security adviser Mike Waltz, testified before the Senate Foreign Relations Committee in his bid to become U.N.