Muhammad Ayn-al-Nas, a 26-year-old Moroccan, started his journey in Casablanca. After flying to Turkey and then to Damascus, he reached his destination in a small Iraqi border town on Jan. 31, 2007. He was an economics student back home, he told the al-Qaeda clerk who interviewed him on arrival. Asked what sort of work he hoped to do in Iraq, Nas replied: “Martyr.”