OpenAI now actively screens for biological and chemical risk with o3 and o4-mini models, and blocks model responses using a ...

Democratic Sen. Mark Warner said had information been leaked from national security officials' Signal chat on plans to bomb ...

This week's story about Washington's group chat mix-up has prompted debate over what constitutes "war plans" and whether the material was classified. The Atlantic has now published the full chat.

The lack of public contrition, let alone resignations, from top officials, reflects a White House that operates in a culture ...

The White House says Elon Musk's team will help probe how a reporter was added to a sensitive Signal chat about airstrike ...

The editor of The Atlantic reported that he was accidentally included in a Trump administration group chat about the U.S. plans to bomb Yemen.

The revelation that President Donald Trump’s most senior national security officials posted the specifics of a military attack to a chat group that included a journalist hours before the attack took ...