Henderson, 17, killed 16-year-old Josselin Corea Escalante before turning his pistol on himself at Antioch High School on ...

In the lobby, a man with salt-and-pepper hair and a blue polo shirt paced. “The girls are upstairs,” he said into his phone. “We’ll do whatever you think is best.” Outside, a jumble of ...

That man is Theodore “Ted” J. Kaczynski, the American terrorist widely known as the “Unabomber.” Of all the corners of social media and its various fads, few are more extravagant than the posts about ...