Should you be not just vigilant about but frightened by the secret programs of the NSA? This National Geographic program offers a look at the inner workings of the National Security Agency─an entity long hidden from citizens by their own government. From pursuing Osama bin Laden to preventing "cyber attacks," the controversial agency is shown carrying out the work of protecting─or, some might say, betraying─the freedoms Americans hold dear. 45 min. Widescreen (Enhanced); Soundtrack: English Dolby Digital 5.1; featurettes.