A police officer stands guard next to flowers placed on the snow in front of the Lame Horse nightclub on Dec. 5, 2009, in Perm, Russia, where a fire broke out after pyrotechnics set plastic and decorative twigs on a ceiling ablaze, killing 152 people. (Associated Press)

A police officer stands guard next to flowers placed on the snow in front of the Lame Horse nightclub on Dec. 5, 2009, in Perm, Russia, where a fire broke out after pyrotechnics set plastic and decorative twigs on a ceiling ablaze, killing 152 people. (Associated Press)