Leopold and Loeb, U2 Spy, Chewing Gum

Don Wildman examines a revolutionary plow that sowed the seeds of a terrifying disaster, a primitive plane that challenges the history of flight and a deceptive coin that's designed to kill.

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Mysteries: Chewing Gum and U2 Spy Pictures

Don Wildman examines a strange substance that was first used ...

One Man's Brave Choice

Learn about US pilot Gary Powers - suspected of defecting ...

02:51

The Fathers of Flight?

Were the Wright brothers really the first to fly?

01:55

The Find of the Century

Did medieval knights beat Columbus to the New World?

02:46

The Invention of Chewing Gum

Thomas Adams creates a multimillion-dollar industry.

03:02

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