One of the comforts of firing a big gun during a siege must be the satisfaction of watching the results at long range. Inside a tank or behind an M107, a smudge of smoke against a building can be marked off against a map coordinate. The blood and shattered bones at the other end of the trajectory have no physical contact with the gun. But Randal and I were driving towards the other end of the trajectory, back to west Beirut, where the casualty statistics marked the other side of the concave mirror through which armies fight their wars.