Progress towards the convening of a conference on the establishment of a Middle East zone free of nuclear weapons and all other weapons of mass destructionattended by all States of the Middle East: Working paper submitted on behalf of the co-convening States (Russian Federation, United Kingdom of Great Britain and Northern Ireland and United States of America Treaty on the Non-Proliferation of Nuclear Weapons - Ninth Review Conference (2015) Co-Convening States Working papers 2015-04-26 NPT/CONF.2015/WP.48 EN