By the time the trumpets sound, the candles have been lit and the salmon platters garnished. Harald V, King of Norway, enters the room, and 200 guests stand to greet him. Then a chorus of 30 men and women, each wearing a blue police uniform, launches into a spirited rendition of "We Are the World." This isn't cabaret night at Oslo's Royal Palace. It's a gala to inaugurate Halden Fengsel, Norway's newest prison.