Nuclear Proliferation

Since the Americans exploded an atomic bomb in the New Mexico desert at Alamogordo on July 16 1945, over

2,000

nuclear devices have been detonated by nine different countries:

USA	1,054*
USSR	715**
France	210
UK	45
China	45
India	5/6
Pakistan	6
South Africa	1
North Korea	2

These ranged in size from a few kilotons to a Russian device of over 50 megatons exploded over Novaya Zemlya in October 1961. This explosion was so large that the shockwave traveled three times around the globe and the mushroom cloud rose to 60 kilometres.

* The USA has conducted 1,054 tests/explosions using at least 1,151 devices.
** The USSR has conducted 715 tests/explosions using at least 969 devices.

References:

1. nuclearweaponarchive.org
2. en.wikipedia.org/wiki/List_of_nuclear_tests
3. en.wikipedia.org/wiki/Tsar_Bomba