TOPSHOT - An anti-riot policeman walks past flames as a petrol bomb exploded in downtown Athens on November 17, 2018, during clashes following a rally commemorating the 1973 students uprising against the US-backed military junta. - At least 44 people were killed in the 1973 military crackdown on the student uprising at the Athens Polytechnic university, an event generally considered to have broken the junta's grip on power and helped the restoration of democracy. The bloodstained Greek flag that flew over the Polytechnic that night is traditionally carried at the head of the demonstration in the capital. (Photo by ARIS MESSINIS / AFP)