BELGRADE, Serbia, October 02, SPA -- Big cluster bomb producers the United States, Russia and China will be urged to join a new treaty banning the use of the deadly weapon, officialsnegotiating the deal said Thursday. «We want the U.S., Russia and China to join,» saidThomas Nash, a coordinator of the Cluster MunitionsCoalition at the start of a three-day conference of 23countries most effected by the weapons, which have causedgrowing concern because of the dangers they pose tocivilians. «The three biggest cluster munitions producers have amoral obligation to join the new treaty, which has so farbeen approved by 81 nations,» Nash told The AssociatedPress.--SPA www.spa.gov.sa/487552