detailed extensively in the guardian newspaper the program is called xkeyscore. an nsa analyst requires no prior authorization from any court to use it to conduct searches on americans. they have to fill in a box saying there is a foreign connection. in addition the article details how xkeyscore surgeries not just e-mail subject lines and addresses, but also the body of the message itself. social media activity and web browsing history. the nsa maintains access to xkeyscore and other search tools is limited. michigan congressman is a skeptic. he tried and nearly succeeded last week in passing legislation and is trying again. the program revealed in the guardian today xkeyscore, how concerned should people be at about it? >> very concerned. we are going to have a classified briefing tomorrow with keith alexander. i intend to ask some questions. one thing we don't know is where