Anti-establishment protesters clash with riot police during a protest against high security prisons in Athens

Anti-establishment protesters clash with riot police during a protest against high security prisons in Athens April 16, 2015. REUTERS/Alkis Konstantinidis

Riot police stand guard with red paint on their shields, thrown by anti-establishment protesters during a demonstration against high security prisons in Athens
Anti-establishment protesters clash with riot police during a protest against high security prisons in Athens