OSLO, Norway — A Norwegian who dressed as a police officer to gun down summer campers killed at least 80 people at an island retreat, horrified police said early today. It took investigators several hours to begin to realize the full scope of Friday's massacre, which followed an explosion in nearby Oslo that killed seven and that police say was set off by the same suspect.norway bombing,norway explosion,norway etf,norway etiquette,norway etiquette culture,norway business etiquette,norway bus routes,weden, oslo, oslo bomb, helsinki, reuters
