A photo taken this week showed Mike Waltz using an app that looks like—but is not—Signal to communicate with top officials.

More than a month after he drew criticism for using Signal to discuss an impending military attack, Waltz was seen using what ...

There are some hurdles former National Security Advisor Mike Waltz must clear first before the United Nations ambassador job ...

Mike Waltz was photographed using Signal in a Cabinet meeting the day before Trump announced he was replacing him as national ...

The app Waltz was using appeared to be “TM SGNL,” a modified version of Signal that retains and archives messages to comply ...

Waltz was at the center of the Signal chat controversy, in which a journalist was accidentally included in a discussion of ...

President Donald Trump announced that Mike Waltz had been ousted as national security advisor. He was previously caught up in ...

President Donald Trump's outgoing national security adviser Mike Waltz was photographed using Signal on his phone during ...

National security adviser Mike Waltz and his deputy, Alex Wong, are exiting the administration, CBS News’s Jennifer Jacobs ...

Mike Waltz, the national security adviser for President Donald Trump, is seen in photos using Signal during a Cabinet meeting ...

Reports say President Donald Trump will fire National Security adviser Mike Waltz, who is blamed for including a journalist ...