On July 21, 1861, Washingtonians trekked to the countryside near Manassas, Virginia, to watch the first major battle of the American Civil War.
Commanders in chief seeking refuge from Washington politics and weather have retreated to destinations across the U.S. map, from the Jersey Shore to Southern California.
Known officially as the Tuskegee Study of Untreated Syphilis in the Negro Male, the study began at a time when there was no known treatment for the disease.
