On July 22, 2011 right-wing extremist Anders Behring Breivik first set off a bomb near the government building in Oslo, killing eight people, before going on a shooting rampage on nearby Utoeya island, where the ruling Labour Party's youth wing was hosting a summer camp.
He killed 69 people on the island, most of them teens, with the youngest having just celebrated her 14th birthday.
In a ceremony at the bomb site, Prime Minister Jens Stoltenberg said Breivik had failed in his declared goal of destroying Norway's commitment to being an inclusive, multicultural society.
"The bomb and the gun shots were meant to change Norway," Mr Stoltenberg told a sombre crowd of a few hundred people at the ceremony. "The Norwegian people answered by embracing our values. The perpetrator lost. The people won."
