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June 17, 2006 - U.S. authorities had intelligence that a team of Al Qaeda-linked terrorists had infiltrated the United States and planned a 2003 attack on the New York City subway system with homemade cyanide bombs, federal and local counter-terrorism officials have acknowledged to NEWSWEEK. But the officials say the plot was called off at the last minute by Al Qaedas Ayman al-Zawahiri-for reasons that remain unclear.
Details of the purported cyanide plot are revealed by author Ron Suskind in his book, The One Percent Doctrine, to be published on June 20. According to a source familiar with the books content, Suskind reports that American authorities first learned about the cyanide plot from an informant inside Al Qaeda known as Ali. According to the book, Ali fed Washington critical information about Al Qaeda between late 2002 and early 2005, until U.S. officials decided that it was too dangerous to the informant to continue to use his reporting.
How an Al Qaeda cell planned a poison gas attack on a NY subway