Debris covers the area outside a building in the centre of Oslo, Friday July 22, 2011, following an explosion that tore open several buildings including the prime minister's office, shattering windows and covering the street with documents. (AP Photo/Fartein Rudjord)

Associated Press
Debris covers the area outside a building in the centre of Oslo, Friday July 22, 2011, following an explosion that tore open several buildings including the prime minister's office, shattering windows and covering the street with documents. (AP Photo/Fartein Rudjord)
Debris covers the area outside a building in the centre of Oslo, Friday July 22, 2011, following an explosion that tore open several buildings including the prime minister's office, shattering windows and covering the street with documents. (AP Photo/Fartein Rudjord)
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