Region
United States
438
Mexico, Gulf of
8
Mexican-American Border Region
7
Texas
7
Afghanistan
5
Iraq
4
Foreign countries
3
Gulf States
3
Washington (D.C.)
3
Austin
2
Canada
2
Florida
2
Indiana
2
Mexico
2
New York (State)
2
Tennessee
2
West
2
Alaska
1
Anacostia (Washington, D.C.)
1
Bahamas
1
Bosnia and Herzegovina
1
Central America
1
Chesapeake Bay (Md. and Va.)
1
Chesapeake Bay Region (Md. and Va.)
1
Chesapeake Bay Watershed
1
Colorado River Watershed (Colo.-Mexico)
1
Cuba
1
Galveston
1
Houston
1
Liberia
1
North America
1
Oregon
1
Portland
1
Puerto Rico
1
South America
1
Soviet Union
1
United States Virgin Islands
1