Two-year-old Salmaan disappears in the chaos of the final days of the war against ISIS. After the war against the Islamic State was won, what became of the children of its fighters? There are thousands of kids like Salmaan, with roots in Canada, the U.K., the U.S. and beyond — many of whom are...

Crimes like this don't often happen on land. A 10-minute slow-motion slaughter captured by a cell phone camera shows a group of unarmed men at sea, possibly 15 of them, killed one by one by a semiautomatic weapon, after which the culprits pose for celebratory selfies. The shocking footage is then...