Many former detainees who joined al Qaeda in Yemen were released under the Bush administration. Many were repatriated to Saudi Arabia in 2007 as part of a Saudi government-sponsored religious rehabilitation program. Within a year, many had slipped into Yemen where they joined al Qaeda's ranks and began plotting to overthrow Saudi Arabia's monarchy. Some terrorism experts said the capacity of al Qaeda's branch in Yemen was minimal until the arrival of the Saudi Guantanamo Bay veterans.
Former Bush administration officials acknowledged Tuesday the growing concern that detainees released under their watch could have been involved in the plot. But they said the decision was the best of imperfect options.