PARIS—The trial of 20 men accused of involvement in a jihadist rampage across Paris in 2015 began under high security in the French capital on Wednesday, with the man widely believed to be the only surviving attacker appearing in a black mask.
Some 130 people were killed and hundreds wounded when gunmen with suicide vests attacked six bars and restaurants, the Bataclan concert hall, and a sports stadium on Nov. 13, 2015, leaving deep scars on the nation’s psyche.