Uka is alleged to have first shot unarmed Senior Airman Nicholas J Alden, a 25-year-old from South Carolina, in the back of the head. He is accused of then boarding the vehicle shouting “Allahu Akbar” - Arabic for “God is great” - and shot and killed the driver, 21-year-old Airman 1st Class Zachary R Cuddeback of Virginia, before firing at others.