PHILADELPHIA — In a series of brazen attacks a few summers back, a man known as the “ruthless robber” stole money from his victims and then opened fire on them, leaving little behind but wounded ...

It’s a stark and alarming trend: Mass shooters engraving bullet casings with cryptic messages, leading officials to speculate about their motives and, more recently, their political affiliations. It ...

Here’s What You Need to Know: Designing these new projectiles won’t be easy. The U.S. Army wants bullets and mortar shells that do more than hit a target. It wants projectiles that can hit a moving ...