Bob Brown looks at an experiment to teach birds a safe migration route, something they do not always learn on their own. Dr. William Sladen puts the experiment to the test by hanging geese in cases suspended from a helium balloon to see if they can learn the route passively.This "20/20" show contains the following additional stories: Dr. Lee Obesity-Veronica's Family Grade InflationThis product is manufactured on demand using DVD-R recordable media. Amazon.com's standard return policy will apply.

