Wil Mara

Discusses what a helicopter crew chief does, and how to become one.

"Provides comprehensive information on the process of earthquakes forming"--Provided by publisher.

A history of race relations in the U.S. includes coverage of slavery, abolition and segregation as well as the events of the Civil Rights movement, discussing subjects ranging from protests and speeches to legislation and the famous people around the world who helped promote equal rights.

Describes different types of trucks.