dr. edwards. >> thank you, jim. and good morning, ladies and gentlemen. like karl, i am so honored to be here and to stand where those heroes of tiananmen square stood. six years ago, i lectured in beijing and shanghai at the invitation of the chinese communist government. and my subject was american conservatism. but as i explained to my host, i could not discuss the american conservative movement without explaining the centrality of anti-communism to its philosophy. and my host said, ok, we understand. and so i talked about the horrific loss of human life and the great leap forward when at least 30 million chinese and probably more died. that was a serious mistake. my host agreed. i then talked about the great cultural revolution when china was plunged into chaos for a decade. yes, my host admitted that was chairman mau's idea, and a bad one. and then i brought up the tiananmen square massacre of june 1989. and my host fell silent. i waited but no confession was forthcoming. there was no admission that one, two, three million chinese had gathered in tha

dr. felten's example, if you were to navigate to the social networking site in his example if it were facebook, we would not be sharing with the ad provider that he was edward felten or that he likes jazz. so on facebook a feed is established where people know what uploading and receive timely reactions from their friends. the privacy policy and users experience inform them about how advertising on the service works. advertising that enables us to provide the service free to yearses is targeted to the expressed attributes of a profile and presented in the space on the page allocated for advertising without granting an advertiser access to any individual userrer's profile. unless an user decides otherwise by directly and voluntarily sharing information with an advertiser, advertisers can only target facebook advertisements against non-personally identifiable attributes of an user derived from profile date too. facebook builds and supports products founded on the principles of transparency and user control and we thank you very much for the opportunity to present our philosophy in the approach to online advertising before this committee. >> the chair thanks t