1. Chile's irate students

2. Students are hit by a riot police water cannon during a demonstration to demand changes in the education system in Santiago. REUTERS/Ivan Alvarado

3. A student protester throws a stone against a riot police vehicle during a demonstration to demand changes in the education system in Santiago. REUTERS/Ivan Alvarado

4. A student protester runs away as they clash with riot police during a demonstration to demand changes in the education system in Santiago. REUTERS/Ivan Alvarado

5. A student clashes with riot police during a demonstration to demand changes in the education system in Santiago. REUTERS/Ivan Alvarado

6. A student protester uses a skate board to hit a police vehicle during a demonstration to demand changes in the education system in Santiago. REUTERS/Ivan Alvarado

7. A riot policeman jumps over a molotov bomb during clashes with student protesters during a demonstration to demand changes in the education system in Santiago. REUTERS/Clemente Villavicencio

8. A student protester is detained outside the education ministry building during a rally to demand changes in the education system in Santiago. REUTERS/Ivan Alvarado

9. Student protesters clash with riot policemen during a demonstration to demand changes in the education system in Santiago. REUTERS/Ivan Alvarado

10. A student protester kicks a tear gas canister during a demonstration to demand changes in the education system in Santiago. REUTERS/Ivan Alvarado

11. A student protester runs away from riot policemen during a demonstration to demand changes in the education system in Santiago. REUTERS/Ivan Alvarado

12. A student protester tries to draw on a riot police vehicle during a demonstration to demand changes in the education system in Santiago. REUTERS/Ivan Alvarado

13. A student protester runs away from riot police water cannon during a demonstration to demand changes in the education system in Santiago. REUTERS/Ivan Alvarado

14. A policeman reacts after clashing with student protesters during a demonstration to demand changes in the education system in Santiago. REUTERS/Ivan Alvarado

15. Student protesters clash with the police during a demonstration to demand changes in the education system in Santiago. REUTERS/Ivan Alvarado

16. Students take cover from a jet of water released by a riot police vehicle during a protest against the government to demand universal free education and changes to the education system in Santiago. REUTERS/Ivan Alvarado

17. Student protesters run away as a riot police vehicle releases a jet of water during a demonstration to demand changes in the education system in Valparaiso. REUTERS/Rodrigo Garrido

18. Student protesters hit a riot police vehicle during a demonstration to demand changes in the education system in Santiago. REUTERS/Ivan Alvarado

19. A student is detained during a protest against the government to demand universal free education and changes to the education system in Santiago. REUTERS/Ivan Alvarado

20. A student protester runs away from tear gas during a demonstration to demand changes in the education system in Santiago. REUTERS/Ivan Alvarado