I'd guess this is designed to startle his less bright colleagues (and there are far too many) who may not have grasped that their information is caught up in this worldwide dragnet. And as persons of interest, their ability to keep their dirty secrets secret is clearly jeopardized.
He's trying to build momentum among his fellows to recognize the danger and reign in the NSA. Added bonus for him is plaguing the NSA with, as Mike noted, the useful framing of the question.
I was surprised and pleased to see this language too:
His leaks revealed that James Clapper Jr., the director of national intelligence, lied to Congress when testifying in March that the N.S.A. was not collecting data on millions of Americans. (There has been no discussion of punishment for that lie.)
Don't recall seeing a mainstream publication use the term "lie" rather than the more weaselly "falsely testified." Better still to see the Times suggest the lie merits punishment.
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