In this August 9, 1945 file photo, a mushroom cloud rises moments after the atomic bomb was dropped on Nagasaki, southern Japan. On two days in August 1945, US planes dropped two atomic bombs, one on Hiroshima, one on Nagasaki, the first and only time nuclear weapons have been used [File: AP Photo]
Treaty signatories include Africa’s most populous country and Europe’s least populated, but Russia and Nato on the sidelines
An international treaty banning all nuclear weapons that has been signed by 51 countries and that campaigners hope will help raise the profile of global deterrence efforts comes into force on Friday.
Although in some respects the step is largely symbolic because the world’s nuclear powers have not signed up, the treaty will be legally binding on the smaller nations that have endorsed it, and it is backed by the UN leadership.
The treaty on the prohibition of nuclear weapons (TPNW) outlaws the creation, ownership and deployment of nuclear weapons by signatory states and places obligations on them to assist other victims of nuclear weapons use and testing.
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