A man puts a flower tribute at the entrance in front of the Embassy of Norway in Moscow, Russia, Saturday, July 23, 2011, in memory of the explosion's and shooting's victims. A homegrown terrorist set off the explosion that ripped open buildings in the heart of Norway's government, then went to a summer camp dressed as a police officer and gunned down youths as they ran and even swam for their lives, police said Friday. (AP Photo/Mikhail Metzel)