we begin with author dave sobel and the book last universe. the ladies at the harvard observatory to the measure of the stars and from the tucson festival of books, natalia hold discusses her book rise of the rocker growth from a from the name to mars. shetterly recalls a group of african-american women to endure the bond, mary jackson, christine darden who were important in the devising of the aeronautic calculations that propelled the united states to believe in the space race. julian guthrie on her book, how to make a spaceship. >> white house correspondent education not mr.'s annual dinner. senior correspondent a notch. he was the entertainment from last year's congressional correspondent dinner in c-span has the video online. >> ladies and gentlemen, we are sitting here at the e.u. that the 2016 presidential election where we the american people get to vote for who we hate the least. right now statistically it looks like hillary clinton should win. that's about right. that is about right. that's the right response to the clinton generally