A 16-year- old student known for his Islamist sympathies had been showing off a smartphone video of an explosive device. He had been interrogated and suspended from one school after threatening to “break the neck” of a Jewish student. GELSENKIRCHEN, Germany—Werner Gallmeister, a high-school headmaster here, called the police in January with a worrying message. Police in 2015 searched his home. Police already knew the teen.

Source: Wall Street Journal June 30, 2016 18:25 UTC