A former Guantanamo Bay detainee spilled the beans that helped authorities find the bombs hidden on FedEx and UPS flights, NPR reports. Jaber al-Fayfi was a member of al-Qaeda who had been released to the Saudi government's re-education program. He rejoined the terrorist cause, taking up with Yemen's al-Qaeda in the Arabian Peninsula, but then turned himself in two week ago, warning of the impending bomb plot.
(More FBI stories.)