Senior government officials mistakenly invited the editor in chief of the Atlantic to a group chat on the messaging app Signal, where the focus of conversation was U.S. airstrikes against rebel groups ...

It was connected to the internet on an unsecured commercial line, sources said. Defense Secretary Pete Hegseth used the Signal app on a personal computer in his office that was connected to the ...

The app, which was introduced in 2014 and has hundreds of millions of users, is widely viewed as the safest messaging tool because of its encryption technology. By Kate Conger Reporting from San ...

Defense Secretary Pete Hegseth shared detailed plans about a military operation against the Houthis in Yemen on a second Signal group chat, this one on his personal phone and including his wife, ...