Norway mourns 77 slain a decade ago in extremist attack

Norway's Crown Prince Haakon Magnus, center, Crown Princess Mette-Marit, left, and Prime Minister Erna Solberg, right, attend a memorial service Thursday marking the 10-year anniversary of the terrorist attack by Anders Breivik in Oslo. (Geir Olsen/NTB scanpix via AP)

OSLO, Norway — Church bells rang out across Norway on Thursday to mark the 10th anniversary of the country’s worst peacetime slaughter as leaders called for renewed efforts to fight the extremism behind the attack that left 77 people dead.