Region
United States
China
9
Middle East
9
Russia (Federation)
9
Africa
7
Europe
6
Pacific Area
6
Indo-Pacific Region
5
Iran
5
North America
5
South America
5
Syria
3
Asia
2
Caribbean Area
2
Congo (Democratic Republic)
2
Cuba
2
Guantánamo Bay Naval Base
2
Hawaii
2
Iraq
2
Korea (North)
2
Korea (South)
2
Latin America
2
Mexican-American Border Region
2
Western countries
2
Afghanistan
1