Riot police walk next a water cannon vehicle kin central Omonoia square central Athens, on Tuesday, Nov. 17, 2020. Police have detained several people and fired tear gas during scuffles in Athens as hundreds of protesters defied a ban on gatherings of more than three people to mark the anniversary of the crushing of a 1973 student uprising against the military junta then ruling Greece. (AP Photo/Thanassis Stavrakis), APTOPIX