The " Global Summit on Nuclear Security " took place 12 – 13 April 2010 . The summit was proposed by President Obama in Prague and was intended to strengthen the Nuclear Non-Proliferation Treaty in conjunction with the Proliferation Security Initiative and the Global Initiative to Combat Nuclear Terrorism . Forty seven states and three international organizations took part in the summit , which issued a communiqué and a work plan . For further information see 2010 Nuclear Security Summit
2010 Nuclear Security Summit
2010 Nuclear Security Summit
Treaty on the Non-Proliferation of Nuclear Weapons