Region
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Ohio
2
Okinawa Island
2
Oklahoma
1
Outer space
2
Pacific Area
1
Pacific Coast
1
Pacific Ocean
1
Panama Canal (Panama)
1
Petroglyph National Monument
1
Petroglyph National Monument (N.M.)
1
Poland
1
Pope Air Force Base
1
Russia
3
Saint Petersburg (Russia)
1
San Francisco
1
San Francisco (Calif.)
1
South Africa
1
South Carolina
2
Soviet Union
2
Swirzerland
1
Tacoma Narrows
1
Tennessee
3
Texas
1
Tinker Air Force Base (Okla.)
2
Traverse City
1
Tumacácori National Historical Park
1
Tumacácori National Historical Park (Ariz.)
1
Tuxedo Park
1
Tuzigoot National Monument
1
Tuzigoot National Monument (Ariz.)
1
United States
743
Virginia
2
Washington
1
Washington (D.C.) Metropolitan Area
1
Washington (State)
1
Washington Metropolitan Area
1
West (U.S.)
1
West Palm Beach
1
Whidbey Island
1
Willow Run
1
Willow Run (Mich.)
1
Wright Brothers National Memorial
1
Wright Brothers National Memorial (N.C.)
1
Wyoming
1
Yemen (Republic)
1
États-Unis
1