Region
United States
101
Soviet Union
18
Developing countries
6
China
3
Europe
3
Europe, Eastern
2
Germany
2
Great Britain
2
Africa
1
Asia
1
Berlin (Germany : West)
1
Berlin (Germany)
1
France
1
Germany (East)
1
Germany (West)
1
Hiroshima-chō (Japan)
1
India
1
Northern Ireland
1
Persian Gulf Region
1
Poland
1
Russia
1
South Africa
1
Syria
1
Yucca Flat (Nev.)
1