Director of National Intelligence Tulsi Gabbard, flanked by FBI Director Kash Patel, left, and CIA Director John Ratcliffe, ...

An image of the Signal app is shown on a mobile phone in San Francisco, March 18. LONDON — A magazine journalist's account of being added to a group chat of U.S. national security officials ...

Dan Caldwell, a senior adviser to Pete Hegseth, has been placed on administrative leave as part of a leak investigation, a ...

A watchdog group has said the exchanges on the Signal app were federal records, and sued in an effort to preserve them.

A top adviser to Defense Secretary Pete Hegseth was escorted out of the Pentagon on Tuesday after he was identified in a ...

The purging of IT and cybersecurity staff at the Department of Health and Human Services could threaten the systems used by ...