One report dispatched to the Pentagon in late September described the discovery of a letter, signed by Zarqawi himself, authorizing an attack on the infamous Abu Ghraib prison outside Baghdad, where many of Zarqawi’s men were being held. The strike was to be carried out by “AMZ elements”—the military abbreviation for Zarqawi’s forces—in October or November, during the annual Ramadan observance, a time when an act of martyrdom is said to carry special rewards in the afterlife.