If you’re one of the millions of Americans who live within range of its 450 intercontinental ballistic missile silos, the Pentagon has written you off as an acceptable casualty. The silos are scattered across North Dakota, Montana, Colorado, Wyoming, and Nebraska in a zone of sacrifice—what lawmakers and military planners …

Drones have changed war. Small, cheap, and deadly robots buzz in the skies high above the world’s battlefields, taking pictures and dropping explosives. They’re hard to counter. ZeroMark, a defense startup based in the United States, thinks it has a solution. It wants to turn the rifles of frontline soldiers …