What are the 1,800 victims of 2015 Paris attacks hoping to get from the trial?

France is putting on trial 20 men accused in the Islamic State group's 2015 attacks on Paris that left 130 people dead and hundreds injured. This is the biggest trial in French history. Among the plantiffs are nearly 1,800 victims, including survivors who suffered physical or psychological harm and families whose loved ones died that night. FRANCE 24's Claire Paccalin answers.