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gregory zuckerman joins us right now and going to talk about his book.reg, how did you get access to this entire process? >> well, from the beginning, i made a bet that these vaccines would be successful and effective and by reaching out to all the scientists, all the executives. the investors, entrepreneurs, and mostly american. american exceptionalism i would argue in terms of both the investors but also the scientists working deep in these labs and working hard to try to develop. >> they got you up to speed as if you were a scientist and got inside and talked to several hundred of them. you watched in moderna and pfizer and johnson & johnson come to market. you have a way to describe this. crippling insecurities and unsung heroes, first off unbridledsed ambition. give me an example. >> so when you take a look at moderna, they were fighting for vaccine developing vaccine for years. and people counted them out. they were skeptical. they are using mrna approach. a lot of them have inside of us in terms of the vaccine. using molecule. >> brian: teaching y