Scores of nations began signing a treaty banning cluster bombs today in a move that supporters hope will shame the US, Russia and China and others into abandoning the weapons. Norway, which began the drive to ban cluster bombs 18 months ago, was the first to sign, followed by Laos and Lebanon, both hard-hit by the weapons. Norwegian Foreign Minister Jonas Gahr Stoere said he expected about 100 of the world's 192 UN member nations to sign by the end of the conference tomorrow. He said 125 countries were represented, but not all would sign. Cluster bomblets are packed by the hundreds into artillery shells, bombs or missiles that scatter them over vast areas. Some fail to explode immediately. The unexploded bomblets can then lie dormant for years until they are disturbed, often by children attracted by their small size and bright colours. ``Banning cluster bombs took too long. Too many people lost arms and legs,'' Norwegian Prime Minister Jens Stoltenberg said as he opened the conference. He said he lived in Yugoslavia as a child, when his father was stationed there as a diplomat. Thirty years later, after the Balkan wars of the 1990s, ``the villages I remember from my childhood where children lived and played became littered with cluster munitions,'' Stoltenberg said. Washington, Moscow and other non-signers say cluster bombs have legitimate military uses such as repelling advancing troop columns. But according to the group Handicap International, 98% of cluster-bomb victims are civilians, and 27% are children. The Bush administration has said that a comprehensive ban would hurt world security and endanger US military cooperation on humanitarian work with countries that sign the accord.