Knowledge of a Qaeda plot is useless if we can't pass it on to local and state authorities.

Mr. Mohammed, the Kuwaiti, may be the link between Sept. 11 and other Qaeda plots.

To foil a Qaeda plot, a British operative masquerades as a Taliban commander just released from Guantánamo.

'Terror University' a Casualty American officials believe the disruption has helped prevent about half a dozen - and possibly many more - Qaeda plots in the last year.

Investigators say he played an important role in subsequent Qaeda plots, perhaps even the Sept. 11 attacks.

Gabriel Allon, an art restorer and an occasional spy for the Israeli secret service, uncovers a Qaeda plot against the Vatican.

What appeared to be another Qaeda plot, involving fertilizer bomb attacks on British pubs and train stations, was exposed last year in part through the program, the officials said.

But Mr. Scott, the United States attorney, now says it was a mistake to label the case as a Qaeda plot.

This was the first "absolute proof" that the attacks were a Qaeda plot.

The Saudi princes reluctantly began an investigation into the possible Qaeda plot.