Region
Soviet Union
United States --
47
Soviet Union --
46
United States
45
China
3
Europe, Eastern
3
Europe, Eastern --
3
China --
2
Europe
2
Europe --
2
Israel
2
Israel --
2
Middle East
2
Middle East --
2
Russia --
2
Syria
2
Syria --
2
United states --
2
Afghanistan --
1
Asia
1
Asia --
1
Austria --
1
Cuba
1
Cuba --
1
Developing countries
1
Eastern Europe
1
Espionage, America --
1
Korea
1
Korea --
1
Latin America
1
Latin America --
1
Pakistan
1
Pakistan --
1
Russia
1
Soviet --
1
United Nations
1
Vienna
1