tom drake says the only thing he betrayed was n.s.a. mismanagement that undermined national security. after a long career in u.s. intelligence, tom drake never imagined he'd be labeled an enemy of the united states. as a young airman, he flew spy missions in the cold war. in the navy-- here with president clinton-- he analyzed intelligence for the joint chiefs at the pentagon. later, he worked for defense contractors in the highly technical world of electronic eavesdropping. he became expert in sophisticated, top secret computer software, and ultimately rose, in 2001, to a senior executive job at the national security agency. >> thomas drake: my first day on the job was 9/11. >> pelley: your first day on the job was 9/11? >> drake: was 9/11. n.s.a. went into immediate crisis management mode. we had failed to protect the united states of america. >> pelley: you felt that was a failure of the national security agency? >> drake: the entire national security establishment. it was a failure, a fundamental systemic breakdown. >> pelley: part