Norway's Prime Minister Jens Stoltenberg speaks during a news conference in Oslo July 23, 2011. A Norwegian dressed as a police officer gunned down at least 84 people at an island retreat before being arrested, police said Saturday. Investigators are still searching the surrounding waters, where people fled the attack, which followed an explosion in nearby Oslo that killed seven. [Photo/Agencies] 

An injured woman is carried by a man at the site of a powerful explosion that rocked central Oslo July 22, 2011. [Photo/Agencies]