So that's not good. You can see how that could be happening; NSA has trunk-level access to telephony circuits. Telcos are engaged in a long-running game of footsie with the government that makes billion dollar Internet companies look like anarcho-capitalists. But I'm not seeing how we get from there to the contents of email. To have the email of arbitrary Americans without a warrant, the NSA would need direct access…
"and the Guardian walked the claim back" No they didn't. "The Guardian has not revised any of our articles and, to my knowledge, has no intention to do so. That's because we did not claim that the NSA document alleging direct collection from the servers was true; we reported - accurately - that the NSA document claims that the program allows direct collection from the companies' servers. Before publishing, we went to…
Greenwald is saying, in effect, "Well, I'm not saying the NSA does or doesn't have direct access; I'm just telling you that I saw a powerpoint slide that says that." Uh huh.
Basically I'm agreeing with tptacek's downthread point: the slide deck claims "direct access", but other than that slide deck, there has been no evidence to support this, and some evidence against it.
As I've said before, I think we should assume that slide deck is a little hyperbolic. This is a deck that claims you can real-time monitor all communications in the world for only $20M. I'm not saying it contains no truth; I'm saying it's a _slide_ _deck_.
Also, btw, the Greenwald article you quote is not his finest. From what I've read in the last two weeks, I respect his agenda, and I respect his efforts to air this story, but some of his self-analysis is seriously lacking. If you're interested in my extensive dissection of that article, https://news.ycombinator.com/item?id=5884619