Some systems work by firing a projectile to destroy it. Others jam the radio frequencies used to control the drones ... that a variety of techniques to counter drones could soon become commonplace ...

Accuracy for conventional pedometers and cell phone apps was measured against a manual step counter; for GPS watches, it was measured against a professional-grade measuring wheel that gauges ...

Some systems work by firing a projectile to destroy it. Others jam the radio frequencies used to control the drones ... Supreme Court rejects a plea to block a copper mine on land in Arizona ...