How an Al-Qaeda Cell Planned a Poison-gas Attack on the N.Y. Subway

Time reported Al-Qaeda terrorists came within 45 days of attacking the New York subway system with a lethal gas similar to that used in Nazi death camps. They were stopped not by any intelligence breakthrough, but by an order from Osama bin Laden's deputy, Ayman Zawahiri.

Wasn't that nice of him.

And the U.S. learned of the plot from a CIA mole inside al-Qaeda.

And you don't think that is an intelligence breakthrough?????

These are some of the more startling revelations by Pulitzer Prize-winning author Ron Suskind, whose new book The One Percent Doctrine is excerpted in the forthcoming issue of TIME. It will appear on Time.com early Sunday morning.

U.S. intelligence got its first inkling of the plot from the contents of a laptop computer belonging to a Bahraini jihadist captured in Saudi Arabia early in 2003. It contained plans for a gas-dispersal system dubbed "the mubtakkar" (Arabic for inventive). Fearing that al-Qaeda's engineers had achieved the holy grail of terror R&D — a device to effectively distribute hydrogen-cyanide gas, which is deadly when inhaled — the CIA immediately set about building a prototype based on the captured design, which comprised two separate chambers for sodium cyanide and a stable source of hydrogen, such as hydrochloric acid. A seal between the two could be broken by a remote trigger, producing the gas for dispersal. The prototype confirmed their worst fears: "In the world of terrorist weaponry," writes Suskind, "this was the equivalent of splitting the atom. Obtain a few widely available chemicals, and you could construct it with a trip to Home Depot – and then kill everyone in the store."

The device was shown to President Bush and Vice President Cheney the following morning, prompting the President to order that alerts be sent through all levels of the U.S. government. Easily constructed and concealed, mass casualties were inevitable if it could be triggered in any enclosed public space.

Having discovered the device, exposing the plot in which it might be used became a matter of extreme urgency. Although the Saudis were cooperating more than ever before in efforts to track down al-Qaeda operatives in the kingdom, the interrogations of suspects connected with the Bahraini on whose computer the Mubtakkar was discovered were going nowhere. The U.S. would have to look elsewhere.

Or perhaps use harsher interrogation techniques.

Conventional wisdom has long held that the U.S. has no human intelligence assets inside al Qaeda. "That is not true," writes Suskind. Over the previous six months, U.S. agents had been receiving accurate tips from a man the writer identifies simply as "Ali," a management-level al-Qaeda operative who believed his leaders had erred in attacking the U.S. directly.

And now that Ime has outed him, he probably will be killed soon.

"The group was now dispersed," writes Suskind. "A few of its leaders and many foot soldiers were captured or dead. As with any organization, time passed and second-guessing began."