Mike Waltz grilled over Signal leak at UN ambassador hearing

The news article discusses the grilling of Mike Waltz, President Trump's former national security adviser, during his UN ambassador hearing. The main focus of the questioning was the inclusion of a journalist on a sensitive group chat discussing war plans, which resulted in a Signal app data leak. Waltz was pressed on how the journalist gained access to the group chat and the potential security implications of the data leak. The article suggests that this incident has raised concerns about the handling of sensitive information and the vetting process for individuals with access to such information. The article does not provide any specific details about the war plans or the identity of the journalist involved. It remains focused on the questioning of Waltz and the potential security breach that occurred. Overall, the article highlights the scrutiny Waltz faced during the UN ambassador hearing due to the Signal app data leak and the concerns it has raised regarding the management of sensitive information.