Russian President Vladimir Putin, accompanied by Head of the Republic of North Ossetia-Alania Sergei Menyailo and Presidential Envoy to the North Caucasian Federal District Yury Chaika, attends a ceremony to lay flowers at the City of Angels cemetery, where the victims of the 2004 Beslan school siege were buried, in Beslan, Republic of North Ossetia-Alania, Russia.