look atsociety an the president, tll me, prident lincoln, did you bet on that? i can't thi of the answer. it would be incredible. jefferson. what is that in the sky? an airplane. a what? an airplan expln that. those this go throu myd. if you could send me back 200 ars, what could i show them to do? what could i teach tm? notng. could you build a tv? airple? tavis: no >> we're dumb. we couldn't show them a thing. vis: wh are some of the this that have most surprised you in yur lifetime? >> the first major surprie as a -- surprise as a broadcaster was sputnik. a psychogist would say this changed amica. we werelways first, nobody beat us in channg the worl. the vaccine where weured polio, and he says, when russia did something befre us, going into space,his threw us and forced us tohange coursend cognize the other people the rise of the civil rhts movement, the death of knedy. that was unbelievable. to live, itry to imagine the mode news world aswe know it with that story. we see the mrderer captured, the alleg murderer, we see him shot on le television, no trial,