Four lingering questions about Trump officials' Signal chat

For the past 48 hours, top White House officials have faced questions from lawmakers and the press about how a journalist came to join a sensitive group chat for an upcoming military operation - and why President Donald Trump's national security team was sharing sensitive information in an unsecure manner.

The Atlantic first reported details of the group chat on the platform Signal after its editor in chief, Jeffrey Goldberg, was added to it. He followed the thread as top Trump administration officials discussed upcoming military strikes against the Houthis in Yemen.