mass shooting

Amarnath Amarasingam, Queen’s University, Ontario Two teenaged gunmen recently opened fire at the Islamic Center of San Diego, killing a security guard and two staff members before being found with fatal self-inflicted wounds in a nearby vehicle. Like so many recent extremist mass shootings, they livestreamed the attack and, uniquely, even livestreamed their suicides. Police ...

By Neil Shortland and Allyssa McCabe In the weeks following two mass shootings in El Paso, Texas, and Dayton, Ohio, police forces across the United States made more than 20 arrests based on threats made on social media. Police in Florida, for example, arrested an alleged white supremacist who, police said, threatened a shooting at a ...