Region
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Lambert Field (Kinloch, Mo.)
1
Memphis
1
Mexico
1
Michigan
2
Middle West
1
Minneapolis Metropolitan Area
1
Minnesota
1
Missouri
1
Moffett Field
1
Montezuma Castle National Monument
1
Montezuma Castle National Monument (Ariz.)
1
Moon
1
New Mexico
1
New York
2
New York (State)
2
North Carolina
2
Ohio
2
Outer space
2
Petroglyph National Monument
1
Petroglyph National Monument (N.M.)
1
Russia
3
San Francisco (Calif.)
1
South Africa
1
South Carolina
2
Soviet Union
1
Tacoma Narrows
1
Tennessee
2
Traverse City
1
Tumacácori National Historical Park
1
Tumacácori National Historical Park (Ariz.)
1
Tuzigoot National Monument
1
Tuzigoot National Monument (Ariz.)
1
United States
354
Virginia
2
Washington (D.C.) Metropolitan Area
1
Washington (State)
1
Washington Metropolitan Area
1
West (U.S.)
1
West Palm Beach
1
Wright Brothers National Memorial
1
Wright Brothers National Memorial (N.C.)
1