 After the King and Crown Prince had to leave Norway on 7 June they felt Sweden might not be the best place for the rest of the family, and started planning for them to go to the United States.On 17 August the Crown Princess and her children left for the United States from Petsamo, Finland, aboard the United States Army transport ship .Harald and his mother and sisters lived in Washington, D.C. during the war, while his father, Crown Prince Olav, and his grandfather, King Haakon, stayed in London with the Norwegian government-in-exile.