this side of the stage we are pleased to present a small exhibit of artifacts bob swanson and bob taylor and we are thrilled to have several with us tonight. will you pleaswill you please se recognized? [applause] we will sell the stories of these remarkable people and others. leslie is the project historian at stanford university and has been a failover for advanced studies and behavioral sciences and other advisory committees at the center at the smithsonian national museum of american history. i would like to share as is our tradition five members. 14 wild cheers chronicled the books published with upstarts prevailed in troublemakers please join me in giving a very warm welcome to leslie berlin. [applause] we are delighted to have you here and enjoyed reading the troublemakers. you've been a chronicler for two decades and you can't understand what's going on unless you understand what came before from a place that is focused on creating the future why is silicon valley importuned? >> i do believe you can't understand what is happening today with out what came before. it is a remarkabl