Region
United States
125
Washington (D.C.)
11
Colorado
6
Afghanistan
1
Albania
1
California
1
Colombia
1
Ethiopia
1
Florida
1
Foreign countries
1
Illinois
1
Indonesia
1
Iraq
1
Keweenaw National Historical Park (Mich.)
1
Liberia
1
Libya
1
Ocoee
1
Peru
1
Rwanda
1
San Francisco
1
Sierra Leone
1
Tennessee
1
Timor-Leste
1
Vanuatu
1
Washington Metropolitan Area
1
World Trade Center Site (New York, N.Y.)
1
Yemen (Republic)
1