these were taken by his wife in a format called kodacolaor. run through a regular projector they look like black and white films, but through a special filter they become color. ande filters did not exist, were colorized -- we got a grant to do that. they were released to the public in february of this year. tourncer: watch the entire of american presidents at the herbert hoover presidential library and museum ethics of rpm and 10:00 p.m. eastern sunday on american artifacts. in-depth, american educator and tea party activist chris van hollen is our guest. >> for different reasons, everybody has an idea that the federal government is out of control. and then the most asked question i get, as we teach, what do you suppose that is? what do we do about it? have we been teaching the constitution properly? for the last 150 years, we would know what to do. announcer: she is the author of several books, including stores for junior patriots, and sovereign duty. during her three-hour conversation we will take your facebook questions and phone calls. wa