Confessions of a Terrorist Author Gerald Posner claims an al-Qaeda leader made explosive allegations while under interrogation By JOHANNA MCGEARY By March 2002, the terrorist called Abu Zubaydah was one of the most wanted men on earth. A leading member of Osama bin Laden's brain trust, he is thought to have been in operational control of al-Qaeda's millennium bomb plots as well as the attack on the U.S.S. Cole in October 2000. After the spectacular success of the airliner assaults on the U.S. on Sept. 11, 2001, he continued to devise terrorist plans. Seventeen months ago, the U.S. finally grabbed...