The Laws of War, US-Style
Michael Byers: No Way to Fight a War
"When civilians are present, international humanitarian law requires belligerents to use weapons that can distinguish between civilians and combatants; they should therefore use the most accurate weapons available to them. In yet another instance of political and financial cost-benefit analyses intruding into international humanitarian law, the US argues that this imposes an unfair burden on it, given the substantial costs involved in producing smart bombs."
http://www.lrb.co.uk/v25/n04/byer01_.html