The arms race to protect small vehicles and buildings against electromagnetic warfare, then, has already begun.

This image released by the US Navy, shows the Office of Naval Research's Electromagnetic Railgun located at the Naval Surface Warfare Center Dahlgren Division. — PHOTO: AFP.

Electronic warfare (EW) refers to any action involving the use of the electromagnetic spectrum or directed energy to control the spectrum, attack an enemy, or impede enemy assaults via the spectrum.