art museum hosts a presentation by alan rothschild who shows images of the collection and talks about the book he and his wife co-authored "inventing a better mousetrap." it's about 50 minutes. when betsy and i decided i would put on a neck's edition of patent models in the building a few years ago, we thought this was a no-brainer because we could go to the smithsonian national museum

alan. mr. rothschild: thank you all for coming. [captions copyright national cable satellite corp. 2016] [captioning performed by national captioning institute] which is responsible for its caption content and accuracy. visit ncicap.org] the church committee, 40 years later, beginning next weekend on american history tv. we will show extended segments of the 1975 hearings that irs, andted cia, fbi, nsa intelligence committee -- activity. the church committee, 40 years later, next weekend on saturday and sunday, only on american history tv on c-span3. >> tonight at 10:00 p.m. eastern, we will take a look at some of the speeches by president obama during his two terms at the white house correspondents dinner. this year will mark his final attendance at the dinner. >> it turns out jeb bush identified himself as hispanic in 2009. you know what? i understand. it's an innocent mistake. it reminds me of when i misidentified myself as american in 1961. [laughter] >> join us tonight at 10:00 p.m. and be sure to tune in for our live coverage