Submitted by n_n in photography (edited )
In Santiago, Chile on Feb. 21. Photos: Martin Bernetti
A barricade burns during a protest
Chilean riot policeman draws a weapon at protestors
Demonstrators burn a barricade
Rescue volunteers carry a demonstrator on a stretcher
A protestor throws a tear gas canister back at riot police
Protestors use lasers to distract or obstruct riot police and their equipment