Principal dancer of the Greek National Opera ballet Danilo Zeka performs a choreography during a training session in Athens September 11, 2014. According to local media, the national opera has significantly increased its production in the last few years, achieving a raise in its profits and attracting more spectators, during a tough austerity period for Greeks. Picture taken September 11, 2014. REUTERS/Alkis Konstantinidis (GREECE - Tags: SOCIETY ENTERTAINMENT)