investigators are asking where in the world is the man at the center of the scandal? former intelligence contract worker eric snowden. members of congress were told in a briefing at the capitol that the national security agency doesn't know, a real irony, says former justice department official andrew mcbride. >> on the one hand the nsa is collecting all this information and we have no liberties and on the other hand they don't know where this guy is. >> reporter: chief of the national security agency and cyber command keith alexander is heading to capitol hill and can expect a grilling this afternoon. at least one member says he was surprised by the scope of the surveillance program. >> i did not know a billion records a day were coming under 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 programs, and it's not just politicians, internet giants, google, microsoft and facebook are calling for permission to tell the public what they gave out