Welcome to the News Hour. A typically ordinary Senate hearing on worldwide threats to the U.S.

became contentious today following news of a major national security breach.

The editor-in-chief of the Atlantic revealed yesterday that he was accidentally put into a chat on the signal messaging app with top U.S.

officials as they discussed military strikes in Yemen.

Two of those officials testified in the Senate hearing today.

Our congressional correspondent, Lisa Desjardin, has our report.

I can just say this. If this was the case of a military officer or an intelligence officer,

and they had this kind of behavior, they would be fired.

Democrats on the Senate Intelligence Committee today hammered CIA Director John Ratcliffe

and Director of National Intelligence Tulsi Gabbard over the signal chat security breach.

Director Radcliffe, were you on the group chat?

Senator, I was on a signal messaging group.

So you were the John Ratcliffe on that chat?

I was.

Thank you. Thank you.

Throughout the heated hearing, Ratcliffe and Gabbard stayed cool, confirming they do use the encrypted app for work purposes

and stating it's allowed for high-level use.

Initially, both denied the chat contained classified information.

To be clear, I haven't participated in any signal group messaging

that relates to any classified information at all.

Okay.

Director Gabry?

...