Based on a month-long mission to Afghanistan last spring, this report documents the harm cluster bombs caused to civilians during the recent war. The report finds that although the United States made some efforts to reduce the civilian harm caused by its cluster bombs, the weapon's fundamental problems remained a lack of accuracy in targeting - making them inappropriate weapons to use near civilian populations - and an excessively large number of submunitions that do not explode on initial contact with the ground, leaving highly volatile and deadly explosives that indiscriminately kill civilians.