Five years after a squad of Islamist killers waged the deadliest attack during peacetime in modern-day France, Prime Minister Jean Castex on Friday paid tribute to those killed, with the country once again on its highest security alert.

The suicide bombers and gunmen killed 130 people and wounded hundreds more in a series of coordinated attacks on entertainment venues on Nov 13, 2015, in a night of bloodletting that etched a deep scar in the nation's psyche...