The public has now endured a decade of dire warnings about the imminence of a terrorist atomic attack. In 2004, the former CIA spook Michael Scheuer proclaimed on television’s 60 Minutes that it was “probably a near thing,” and in 2007, the physicist Richard Garwin assessed the likelihood of a nuclear explosion in an American or a European city by terrorism or other means in the next ten years to be 87 percent. By 2008, Defense Secretary Robert Gates mused that what keeps every senior government leader awake at night is “the thought of a terrorist ending up with a weapon of mass destruction, especially nuclear.” Few, it seems, found much solace in the fact that an al Qaeda computer seized in Afghanistan in 2001 indicated that the group’s budget for research on weapons of mass destruction (almost all of it focused on primitive chemical weapons work) was some $2,000 to $4,000.

This is from John Mueller, “The Truth About al Qaeda: Bin Laden’s Files Reveal the Terrorists in Dramatic Decline,” Foreign Affairs, August 2, 2011. The whole thing, which is short, is worth reading.

Mueller is one of the most grounded analysts in the area of “homeland security.”