PARIS – Tens of thousands of people including more than 40 world leaders streamed into the heart of Paris on Sunday for a rally of national unity to honor the 17 victims of three days of terror. The aftermath of the attacks remained raw, with video emerging of one of the gunmen killed during police raids pledging allegiance to the Islamic State group and detailing how the attacks were going to unfold. Also, a new shooting was linked to that gunman, Amedy Coulibaly, who was killed Friday along with the brothers behind a massacre at satirical newspaper Charlie Hebdo in...