Cornerstones of freedom

Presents a history of the relationship between Mexico and the United States, discussing the war of 1846 between Mexico and the United States, how Mexico became independent in 1821, and why immigration has become a controversial issue for both countries in recent years.

Describes the creation of the United States Constitution and discusses amendments.

Describes the events of the Tiananmen Square massacre of June 1989, and covers economic reform in China, the beginnings of a pro-democracy movement, and how the Chinese government dealt with the aftermath of the massacre.

Describes significant people and events in the Civil War and examines Robert E. Lee's surrender to Ulysses S. Grant at Appomattox.

Presents the life and career of Steve Jobs, who was the founder of Apple, a computer and technology company.

Discusses the space race between the Soviet Union and the United States and how it led to the creation of NASA.

Looks at the history of the Panama Canal and its construction.

Explores various details of frontier and pioneer life in connection with the Oregon National Historic Trail, covering topics such as the growth of fur trapping and the contest between different nations for control of Oregon, and who helped discover the best routes.

Discusses the history of how the United States has collected intelligence and what kinds of technology are used by intelligence organizations.

Looks at the Louisiana Purchase of 1803 as a turning point in the history of the United States, relates the story of how the purchase of the land was negotiated with France, briefly chronicles the Lewis and Clark expedition, and discusses the effect of the expansion on the country and its people.