Tuesday marks a year since Bulgaria pleasure boat went down in the Volga River. Prayers will be held in Russia’s Republic of Tatarstan, where the riverboat sank during a thunder storm, with more than 200 people on board. A memorial to the victims of the tragedy will be opened in the republic’s main city of Kazan.Bulgaria sank at Kuibyshevskoye reservoir in Tatarstan on July 10, claiming 122 lives, including 28 children. Poor condition of the vessel was blamed for the tragedy. The inspection revealed engine and radio alert system failure, lack of rescue kits and that the vessel's capacity had been exceeded, as it was carrying 201 passengers instead of the permitted 156.