tilling "the south china morning post" it is here he wants to make his last stand, to reveal what he called the criminality of the u.s. government surveillance programs and its targets worldwide. and snowden may be holding a lot more secrets. his last post was at the nsa, national security agency facility in hawaii. that is a hub for american spying and computer hacking on china and north korea as well as hong kong. intelligence analysts say if he makes public the precise names of government officials and others who are targets, it could be far more devastating than what he has done so far. >> that is the $64,000 question. we don't know who the targets are. if that ever comes out, then there will be some serious damage to national security. >> reporter: in congress, head of the nsa general keith alexander said snowden has already hurt the u.s. >> great harm has already been done. by opening this up. our security is jeopardized. >> reporter: alexander and