Region
Afghanistan
1
Arctic regions
1
Asia
1
California, Southern
2
China
15
Developing countries
1
East Asia
1
England
1
Europe
5
Foreign countries
5
Germany
1
Great Britain
3
Greece
1
Hanscom AFB (Mass.)
2
India
2
Iraq
8
Israel
1
Israël
1
Ohio
1
Philippines
1
Ravenna
1
Russia (Federation)
9
Saudi Arabia
1
South America
1
Soviet Union
2
Syria
1
Texarkana
1
Texas
1
United States
637
États-Unis
1