Secretary-General cites 'considerable progress' implementing action programme on small arms, outlines challenges, in message to Headquarters meeting : [message, to the 3rd Biennial Meeting of States to Consider the Implementation of the Programme of Action to Prevent, Combat and Eradicate the Illicit Trade in Small Arms and Light Weapons, New York, 14 July 2008] / [on behalf of the UN Secretary-General, by the High Representative for Disarmament Affairs]