Region
United States
4,105
China
140
Russia (Federation)
108
Asia, Central
66
Iran
51
Europe
37
Middle East
36
Korea (North)
35
Mexican-American Border Region
35
Latin America
28
Soviet Union
28
Central America
24
Washington (D.C.)
23
Mexico
22
Syria
22
Canada
21
Africa
20
Ukraine
20
Iraq
18
Arctic regions
17
Afghanistan
15
European Union countries
15
Pacific Area
15
Yemen (Republic)
13
Outer space
10
Indo-Pacific Region
9
North America
9
Developing countries
8
Foreign countries
8
Cuba
7
Japan
7
Pakistan
7
South America
7
Taiwan
7
India
6
Northern boundary of the United States
6
Asia
5
Belarus
5
Caribbean Area
5
Europe, Eastern
5
Southeast Asia
5
Balkan Peninsula
4
Eurasia
4
Lebanon
4
Massachusetts
4
Nicaragua
4
Saudi Arabia
4
Turkey
4
Venezuela
4
Vietnam
4
more ...