EXPLAINER: What's at stake in the 2015 Paris attacks 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

PARIS -- 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. The proceedings begin Wednesday in an enormous custom-designed chamber. Nine gunmen and suicide bombers struck within minutes of each other at the national soccer stadium, the Bataclan concert hall and restaurants and cafes on Nov. 13, 2015. The lone survivor of the extremist cell from that night is among those being tried for the deadliest attack in France since World War II. The same IS network went on to strike Brussels months later, killing another 32 people. WHO'S ON THE STAND?