Prince Haakon and Princess Mette-Marit attend a Memorial Service

Prince Haakon and Princess Mette-Marit attend a Memorial Service Crown Prince Haakon and Crown Princess Mette-Marit of Norway attends a memorial service for the victims of the 2011 terrorist attacks on July 22, 2016 in Oslo, Norway. Oslo and Utøya attacks of 2011, terrorist attacks on Oslo and the island of Utøya in Norway on July 22, 2011, in which 77 people were killed—the deadliest incident on Norwegian soil since World War II.