The Soviet Union detonated its first nuclear weapon on Aug 29, 1949.
The first nuclear explosion from US occurred on 1945.
China conducted its first nuclear test in 1964.
The first nuclear device "Gerboise Bleue," (Blue Gerbil) was detonated on February 13, 1960.
Britain detonated its first atomic device on October 3, 1952.
Pakistan conducted its first nuclear test on 28 May 1998.
India did its first nuclear test in Pokhran under the name Operation Smiling Buddha.
Israel started its nuclear program in 1948.
The country admitted to having nuclear weapon in 2005.