Twitter co-founder Jack Dorsey developed Bitchat, a privacy-focused messaging app that works offline via Bluetooth without ...

Former National Security Advisor Mike Waltz faced scrutiny over a Signal chat incident during his U.N. ambassador hearing ...

Former national security adviser Mike Waltz defended his use of the messaging app Signal during a confirmation hearing ...

Mike Waltz, President Donald Trump’s nominee for U.S. ambassador to the United Nations, appeared before the Senate Foreign ...

Mike Waltz, Trump's former national security adviser, faced questions from Democrats on the Signal chat controversy Tuesday ...

Mike Waltz, President Donald Trump’s nominee for ambassador to the United Nations, will face questioning from lawmakers after ...

Michael Waltz, the former national security adviser, doubled down on the Trump administration’s defense of a Signal group ...

President Trump's former national security adviser was pressed on the inclusion of a journalist on a sensitive group chat ...

The MBTA's general manager said that a decades-old cable led to the shutdown of the Blue Line on Tuesday, which prompted the ...