(I) India’s first nuclear test, (2) Comprehensive Test Ban Treaty comes to force, (3) France and China sign Non Proliferation Treaty

(I) India conducts its second nuclear test - 1998, (2) N. Korea conducts test of nuclear weapon, (3) Chernobyl nuclear power station accident in Ukraine

(I) International Atomic Energy Agency set up, (2) France conducts first nuclear test, (3) China conducts its first nuclear test

(I) France and China sign Non Proliferation Treaty, (2) India conducts its second nuclear test, (3) France conducts first nuclear test