the president made light of the situation and said the demonstrators were at the wrongally. facebook investors gave people a lot to like this morning. they build out wall street estimate. advertising revenues are at 66% with half of that coming from ads on mobile devices. and those are the headlines. i'm tony harris. "inside story" is next on al jazeera america. >> the nation's top spies deny they've gone rogue and insist they're doing their job of keeping america safe. on tonight's inside story balancing security and liberty in the eye of a political storm. >> hello, i'm libby casey. what is usually secret is out in the open tonight, and the national security agency is on the defensive on multiple fronts. the nsa surveillance practices at home and abroad have been front page news afte after the s from nsa contractor edward snowdon. now, bills are in the works in the house and senate that would rein in the spy masters. tonight on inside story we'll take a closer look at the nsa since 9/11, including its mission, it's practices, and it's future. but first this background. >>