metal detectors

This book gives young readers a glimpse into the job of a transportation security administration.

Explores the science and technology of air transportation, including technologies such as x-ray security devices and the use radar for air traffic control. Explains how lift allows airplanes to fly.

Introduces treasure hunting, geocaching, and the use of metal detectors.

Describes the instruments and techniques used in locating such things as metal, enemy submarines, petroleum, tornadoes, and skyjackers.

When Arf can't resist temptation and opens a package meant for his neighbor, its contents lead him to more trouble, a couple of crooks, and a buried treasure.