today we'll hear from marko rubio, ted cruz, jeb bush, donald trump, ben carson, and others and our live coverage picks up this morning at 10:30 eastern. on c-span3, a discussion on defense department acquisitions, best practices, and ways to improve purchasing for the pentagon hosted by the lexington institute at noon eastern. also today a look at the criminal justice system, topics include the use of force among law enforcement officers from the federalist society. that's live at 12:15 eastern on our companion network, c-span2. ahead of the paris climate talks, energy secretary earnest moniz will talk about climate change issues. that's live at 2:30 this afternoon. also on c-span2. >> signature feature of c-span2's book tv is our coverage of book fairs and festivals from across the country with nonfix author talks, interviews, and viewer call in segments. coming up book tv will be live from the 3 nd annual miami book fair. our coverage starts on saturday, november 21, at 10:00 a.m. eastern. authors include representative john lewis, discussing his book "march" book two. a live call in