and disrupting or contributing to the disruption. >> out of those millions, dozens have been critical? >> that's correct. >> reporter: most of the details he says are classified, but alexander was more than willing to admit this intelligence helped stop a plot to attack the new york subway system, leading to suspect imaginajibul azazi i 2010. but the target of the investigation, former nsa contractor snowden remains defiant believed to be in hong kong telling the "south china morning post" i would rather stay and fight the united states government in the courts. 'cueses the u.s. of hacking network backbones like huge internet routers, targeting hong kong and china and proclaims he's neither traitor nor hero but what to call him is less of an issue than how a high school