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Intel Chair Blows Smoke about NSA, Subway Gas Attack

UPI's Shaun Waterman spoke with intel sources who told him there were two theories why the attack was called off -- neither of which involved the NSA:

The first was that Zawahiri was concerned the plot would not be successful enough to top the Sept. 11 attacks, by killing more people or causing more panic -- a goal that is widely thought to be a big strategic factor in al-Qaida's operational planning. . . .

[A] second possibility considered by intelligence analysts was that Zawahiri feared the plot might be too successful -- and bring redoubled efforts to capture the remnants of the al-Qaida leadership. . .

I called Roberts' office to see if he could give me more information to justify his statements -- but they haven't called back. Meanwhile I've reached out to Suskind, hoping he can shed some more light on the matter. I'll let you know if I hear anything more.