DUBLIN, Ireland (AP) - Diplomats from 111 nations formally adopted a landmark treaty banning cluster bombs on Friday after futile calls for participation by the weapons' biggest makers and users, particularly the United States.

U.N. Secretary-General Ban Ki-moon urged every nation in the world to sign the painstakingly negotiated pact "without delay."

Twelve days of negotiations ended after diplomats from scores of nations delivered speeches embracing the accord. It requires signatories not to use cluster bombs, to destroy existing stockpiles within eight years, and to fund programs that clear old battlefields of dud bombs.