a briefing at the capital that the national security agency doesn't know a real irony says former justice department official andrew mcbride. >> on one hand, the nsa is collecting all of this information, and we have liberties on the other hand, they don't know where this guy is. >> reporter: chief both the national security agency and the u.s. cybercommander, heading to capitol hill hill and can expect a grilling this afternoon. at least one member said he was surprised by the scope of the surveillance program. >> i did not know one billion records a day were coming understand the control of the federal executive branch. >> reporter: it's part of the growing outcry for the government to make more information available to the public about its secret phone and internet tracking program. and it's not just politicians. internet giants, google, microsoft and facebook are calling for greater transparency, and permission to tell the public what they gave