racist, no matter whether they are in the white house or planning the next mass shooting. 11:00, formert defense jim mattis recounts his military career and his thoughts on leadership, in his book, callsign chaos. watch book tv every weekend on c-span two. announcer 2: the c-span cities tour continues. up next, we visit the at

racist, no matter whether they are in the white house or planning the next mass shooting. 11:00, formert defense secretary jim mattis recounts his military career and his thoughts on leadership, in his book, callsign chaos. watch book tv every weekend on c-span two. announcer 2: the c-span cities tour continues. up next, we visit the sheraton county museum to hear about the impact mining has had on the area. >> colt has a star in the geological past of wyoming. at various times throughout this area's history, before it became a state, most people might not realize that looking at wyoming nowadays, but wyoming used to be subtropical to tropical regions and at one point, we were actually an ocean. intof that has factored the fossil fuels within the state, whether they be natural so, that coal, and prehistory sets the stage for modern-day sheridan and the story of coal here. in 1880, some of the first outcroppings of coal are discovered on private lands. the landowners at that time discovered, especially if the seams were open, that they could not only mine the coal for their personal usage, weathe