Region
United States
449
Mexican-American Border Region
9
Mexico, Gulf of
8
Texas
7
Afghanistan
6
Iraq
5
Washington (D.C.)
4
Foreign countries
3
Gulf States
3
Puerto Rico
3
Arizona
2
Austin
2
Canada
2
Colorado
2
Florida
2
Indiana
2
Mexico
2
New York (State)
2
Tennessee
2
West
2
Alaska
1
Anacostia (Washington, D.C.)
1
Australia
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
Columbia River Watershed
1
Cuba
1
Galveston
1
Great Lakes (North America)
1
Haiti
1
Honduras
1
Houston
1
Liberia
1
Michigan
1
Milwaukee
1
North America
1
Oregon
1
Portland
1
South America
1
Soviet Union
1
United States Virgin Islands
1
Wisconsin
1