A Ka-52 helicopter is on display during an event entitled "Innovations Day" organized by Russia's Western military command at Levashovo airbase outside St. Petersburg, June 6, 2014. The exposition, attended mostly by military professionals, displays innovative and advanced technologies of the Russian defence industry, including radio link equipment, unmanned aircraft, special military software and other items, according to the official press release. REUTERS/Alexander Demianchuk (RUSSIA - Tags: MILITARY)