Geography
United States
2,600 results
Soviet Union
60 results
Great Britain
24 results
Europe
20 results
Antarctica
16 results
Developing countries
16 results
Japan
16 results
Panama Canal (Panama)
15 results
Canal Zone
12 results
Outer space
11 results
Texas
10 results
Korea (North)
9 results
Mexico
9 results
New Mexico
9 results
Alaska
8 results
California
8 results
Hawaii
7 results
New York (State)
7 results
Panama
7 results
Arctic regions
6 results
Great Lakes (North America)
6 results
Africa
5 results
Atlantic Ocean
5 results
Canada
5 results
China
5 results
Germany (West)
5 results
Iran
5 results
Iraq
5 results
Latin America
5 results
Massachusetts
5 results
Chesapeake Bay (Md. and Va.)
4 results
Europe, Eastern
4 results
India
4 results
Israel
4 results
Middle East
4 results
Middle West
4 results
Nevada
4 results
Vietnam
4 results
Earth (Planet)
3 results
Germany
3 results
Griffiss Air Force Base (N.Y.)
3 results
Louisiana
3 results
Mississippi
3 results
New Jersey
3 results
North America
3 results
Ohio
3 results
Pennsylvania
3 results
Potomac River
3 results
Turkey
3 results
Utah
3 results
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