Twitter co-founder Jack Dorsey developed Bitchat, a privacy-focused messaging app that works offline via Bluetooth without requiring email, phone numbers or personal data.

Mike Waltz, President Donald Trump’s nominee for U.S. ambassador to the United Nations, appeared before the Senate Foreign Relations Committee on Tuesday for his confirmation hearing.

Senators questioned ex-Trump national security adviser Michael Waltz at confirmation hearing about a Signal chat that contained sensitive information.

Former National Security Advisor Mike Waltz faced scrutiny over a Signal chat incident during his U.N. ambassador hearing before the Senate Foreign Relations Committee.

The MBTA's general manager said that a decades-old cable led to the shutdown of the Blue Line on Tuesday, which prompted the evacuation of 500 people under Boston Harbor.

The Kremlin said U.S. President Donald Trump signaled to Ukraine that it should continue the war after he said he would send more weapons to Kyiv and threatened Russia with secondary sanctions unless it makes peace.

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