Good find jimbo...
More on the plot from Newsweak...
http://www.msnbc.msn.com/id/13385543/site/newsweek/
The counter-terrorism officials also confirmed Suskind’s reporting that U.S. intelligence indicated that the subway attack was called off personally by Zawahiri. Though the officials said U.S. intelligence was still not certain why the attack had been cancelled, one former official said some feared that Zawahiri had cancelled the subway attack because Al Qaeda was planning something even more deadly and spectacular inside the United States—an event that, if planned, so far has not materialized.
And more from Newsweak...
http://www.msnbc.msn.com/id/13385543/site/newsweek/page/2/
On one key point, however, current and former officials familiar with the threat disputed Suskind’s account. The officials said there was no reason to believe that the Al Qaeda team assigned to the attack was still on the loose somewhere inside the United States. In fact, NEWSWEEK sources said, most U.S. officials believe the team had exited U.S. borders. “The notion that the cell is still in the U.S.…is not the case,” said one senior local-law enforcement official familiar with the matter. Suskind reiterated to NEWSWEEK that his sources say there is "no evidence" that the terror team has left the country. He said that anyone who claims otherwise is "not properly sourced." Suskind declined to comment further on the contents of the book.