thank you very much, bob sagat in just a moment. >> bob sagat has been elected to play. >> i know. e tidal basin. bob, that's maria molina and she's got a science trivia question and you're going to play along with us. >> excellent. >> thanks for playing along. here is today's question. it's about how many cherry trees are there on the national mall? is it a, about 250. b, about 1580. c, 3800. or d, 9440. about how many cherry blossom trees do you think are on the national mall? >> we should tell bob if he gets it wrong, we do not talk about his book. so there is a lot of pressure, bob. >> i can't tell a lie. >> what do you think? >> do you want my answer? >> yes. >> c. >> c. >> you're correct! >> oh, my goodness! >> your answer is correct. >> maria, go out -- >> i'll go out and look for cherry trees. >> the trees are beautiful down there, aren't they, maria? >> yeah. it's absolutely beautiful. you can see the tidal basin behind me, the washington memorial in the distance and all of the cherry blossom trees are starting to bloom. they haven't reached peak bloom yet. and that's becau