Dark Days of the Ku Klux Klan Parading Down Pennsylvania Avenue

This is absolutely horrifying.

Some of you may not know this, but in 1928 (and a number of other times in the 1920s), the Ku Klux Klan was permitted to parade down Pennsylvania Ave. Hard to believe, I know.

http://www.youtube.com/watch?v=UomPUYgxSTY