Region
United States
267
Washington (D.C.)
34
Great Plains
4
Banghāzī
2
China
2
Kentucky
2
Libya
2
Nevada
2
Paducah
2
Tennessee
2
Yucca Mountain
2
Atlanta
1
Bahamas
1
Cheyenne
1
Delaware River Watershed (N.Y.-Del. and N.J.)
1
Florida
1
Foreign countries
1
Georgia
1
Greenville
1
Guam
1
Harrisburg
1
Iraq
1
Louisiana
1
Memphis
1
Mexican-American Border Region
1
North Carolina
1
Oak Ridge
1
Ohio
1
Pennsylvania
1
Piketon
1
Saudi Arabia
1
Shreveport
1
Tallahassee
1
Texas
1
West Virginia
1
Wheeling
1
Wyoming
1