Why would you want to detect metal? Oh, I don't know … maybe you want to find some gold in the ground. You could dig up ALL the dirt, or you could find the location that has the gold before you dig.

When you picture a metal detector, you probably imagine a device that has a long shaft with something that looks like a small steering wheel attached to the bottom end. The user walks along the beach, ...

THE TECHNOLOGY’S EFFICACY. YEAH. WHEN IT COMES TO KEEPING SCHOOLS SAFE, SECURITY EXPERTS TELL ME A METAL DETECTOR ALONE IS NOT ENOUGH TO PREVENT WEAPONS FROM GETTING INSIDE. ACCORDING TO OFFICIALS ...