Speaking July 28 on ABC's "This Week With George Stephanopoulos," investigative journalist Glenn Greenwald reported that new revelations to be published this week, on which he has been working for the past month, will prove that everything former contractor Edward Snowden charged about massive NSA spying, was absolutely true.

They will also demonstrate, he added, that James Clapper, Jr., Director of National Intelligence (DNI), "really did get caught red-handed lying to the American Congress," for which he should have been fired.

Low-level NSA analysts can easily access stored info. CC: Jeremy Keith

Greenwald explained that his forthcoming report will show that even low-level NSA analysts—including private contractors—can very easily access phone calls, e-mails, Microsoft Word documents, or anything else collected by the NSA and stored in its database, just by using simple screens like those used by a supermarket clerk or shipping and receiving clerks and entering an e-mail address or an IP address.

"It's all done with no need to go to a court, with no need to even get supervisor approval from, on the part of the analyst. There are legal constraints for how you spy on Americans. You can't target them without going to the FISA Court, but these systems allow analysts to listen to whatever e-mails they want, whatever telephone calls, browsing history, Microsoft Word documents. It's an incredibly powerful and invasive tool exactly of the type Mr. Snowden described. NSA officials are going to be testifying before the Senate on Wednesday, and I defy them to deny that these programs work exactly as I said."

Greenwald emphasized that the real issue "is that what the NSA does, is done in complete secrecy. Nobody really monitors who they're eavesdropping on. And so the question of abuse is one that the Congress ought to be investigating much more aggressively."

On the same program, Senator Dick Durbin (D-Ill.) pointed to the importance of last week's vote in the House on the amendment proposed by Republican Rep. Justin Amash and Democrat John Conyers, both of Michigan, which came within six votes of overturning the NSA's surveillance dragnet against American citizens. That vote, Durbin said, shows that "the sentiment is growing for oversight."