Region
United States
595
Colorado
190
Alamosa
17
Washington (D.C.)
8
Europe
6
Iraq
4
Africa
3
Mexican-American Border Region
3
Afghanistan
2
Developing countries
2
Gulf Coast (U.S.)
2
Nevada
2
Outer space
2
Pacific Area
2
Puerto Rico
2
Vieques Island
2
West (U.S.)
2
Yucca Mountain
2
Africa South of the Sahara
1
Africa, Sub-Saharan
1
Alaska
1
Anacostia (Washington, D.C.)
1
Arctic regions
1
Boulder
1
California
1
Chesapeake Bay Region (Md. and Va.)
1
Cheyenne Mountain
1
Cheyenne Mountain (Colo.)
1
Colorado River (Colo.-Mexico)
1
Foreign countries
1
Gaza
1
Gaza Strip
1
Haiti
1
Indiana
1
Korea (North)
1
Korea (South)
1
Little Calumet River (Ind. and Ill.)
1
Little Calumet River Watershed (Ind. and Ill.)
1
Mexico
1
North Dakota
1
Northeastern States
1
Operations othern than war
1
Pueblo
1
Republican River Valley (Neb. and Kan.)
1
Utah
1
Valley Forge National Historical Park (Pa.)
1
Washington Metropolitan Area
1
West Bank
1