United States , Russia absent from negotiations of cluster bomb ban treaty signing . Currently , Russia , China , India are top four cluster bomb producers . But four of the biggest cluster bomb makers -- Russia , China , Israel and the United States , which claims the devices are a vital part of its defense strategy , stayed away . U.S. insists the devices are important part of its defense strategy .
United States , Russia absent from negotiations of cluster bomb ban treaty signing . Currently , Russia , China , India are top four cluster bomb producers . U.S. insists the devices are important part of its defense strategy .