The White House made a mistake. They added a journalist to a secret chat. The chat was about a military plan in Yemen. The journalist saw the plan before it happened. This made many people upset.

The journalist got a message from someone who looked like a security adviser. He thought it was a mistake. But he saw the chat and the plan. The plan was about attacking a group in Yemen. Some people think this mistake is very bad.

Many people want to know how this happened. Some people think the chat was good work. Others think it was a big problem. The government is looking into it. They want to make sure it does not happen again.