Protesters clash with the riot police during a demonstration in... Photo d'actualitéAthènes,CRS,Conflit,Confrontation,Grèce,Horizontal,Manifestant,Manifestation,Tous types de crisesPhotographer Collection: AFP 2013 AFPProtesters clash with the riot police during a demonstration in Athens on January 12, 2013. Several thousand people demonstrated in Athens to protest recent police operations against squatters in public buildings that have been condemned by the opposition. The protesters -- estimated by police at around 3,500 and nearly double that by media -- marched to the Athens court complex and police headquarters to demand the release of scores of individuals arrested in the sweeps. One of the central Athens buildings, a 19th-century former school, had been occupied for over two decades. The other is a stately block of flats whose former occupants include legendary soprano Maria Callas before her rise to fame. AFP PHOTO/ LOUISA GOULIAMAKI (Photo credit should read LOUISA GOULIAMAKI/AFP/Getty Images)