A protester, bottom, and riot policeman react after catching fire from a gasoline bomb during a protest in the the northern city of Thessaloniki, Greece, Thursday, April 15, 2021. The protester was arrested on suspicion of throwing a gasoline bomb, authorities said. He was taken to hospital after being injured during his arrest, apparently when a gasoline bomb landed nearby, catching both the protester and the riot policeman detaining him. Clashes between small groups of demonstrators and police broke out in the northern Greek city of Thessaloniki at the end of a march to protest a new law allowing the policing of university campuses. (AP Photo/Achilleas Chiras)