Cornerstones of freedom

Presents an introduction to the Lewis and Clark Expedition, providing information on the Louisiana Purchase and their travels westward to Oregon from 1804 to 1806.

Examines how the Internet began, and looks at some of the people and companies that have influenced it.

Examines how hydrofracking works, how it used today, and the controversy surrounding it.

Presents the events that lead to the death of Osama bin Laden, the mastermind behind the 2001 terrorist attacks on the United States, discussing why it was important to find him, how he had originally escaped the United States military, and more.

Discusses the creation of the Department of Homeland Security in the United States in response to the terrorist attacks of September 11, 2001, explains the role of different agencies in the department, introduces some of the department's leaders, and looks at criticism of the department's activities.

Explores the causes of the economic crisis in the United States in the first decade of the twenty-first century, looks at how the recession has affected U.S. citizens, and discusses the government response.

Presents an introduction to the Great Depression of the 1930s discussing the economic boom of the 1920s to the depressions conclusion during World War II, how Americans survived after losing their jobs and what the United States government did to combat the effects of the depression.

Describes the events surrounding the Gettysburg Address, covering why the United States split during the Civil War, what inspired President Lincoln to write the Gettysburg Address, and how it has been preserved over time.

Provides an account of the Battle of Gettysburg in July, 1863, featuring background on the Civil War, looking at the role of geography in the outcome of the fight, introducing the leaders of the battle, and discussing why Gettysburg was key to Union victory in the war.

Describes the events of the French Revolution, covering why the people of France revolted, the difficulties that the revolutionaries encountered in establishing a new government, and how Bonaparte made use of the revolution to become emperor of France.