By the dawn of the 19th century, tuberculosis had killed one in seven of all people that had ever lived. Browse images of America's fight against the deadly disease.
The Ku Klux Klan was organized after the Civil War by a small group of men aiming to form a brotherhood during the time of Reconstruction in the 1860s.
By the 1930s, Robert Ripley was well-known for his cartoons of the bizarre and unbelievable people, places and things that he had seen on his travels around the globe.
In 1964, over 700 volunteers joined organizers and local African Americans in Mississippi to participate in The Mississippi Summer Project. Explore the photos.
During World War I, letters were the main method of communication between soldiers and the homefront. This gallery of war letters from the Center for American War Letters offers a glimpse into the lives of the men and women who lived through World War I, in their own words.
