1. II.C.24 Treaty on the Non-Proliferation of Nuclear Weapons (NPT) (1 July 1968)
2. A World Free of Nuclear Weapons;George P Shultz;The Wall Street Journal,2007
3. ?view0print&comm_ref0false (accessed Maech 23, 2013); and The White House;Barack Obama;Prague Speech on Nuclear Weapons,2009
4. On the UK reductions;On the New START Treaty,2013
5. On the B61 bomb upgrade, see ''Throwing Money at Nukes;Lewis A Dunn;The NPT: Assessing the Past, Building the Future,2009