Last week a man jumped over a fence and ran into the White House. He entered the East Room–one of the famous rooms in the historic home of the American president–before he was finally stopped. This was very embarrassing for the Secret Service, who are the special police that protect the president. The director of the Secret Service resigned today. Some people hope a new director will make serious changes, because this event was only one of several problems with the Secret Service in the last few years.