Dedicated by President Herbert Hoover in 1931, the District of Columbia War Memorial honors the residents who served and died in World War I. Inscribed on the floor of the domed monument are the names of the 499 DC residents who perished in that…

The current zero milestone dates from the spring of 1923, replacing a temporary marker placed on this site in President's Park in 1919. Originally intended as a central point from which to measure highway distances throughout the United States, the…