Region
United States
12
Pennsylvania
5
Philadelphia
3
Philadelphia (Pa.)
3
États-Unis
2
Pennsylvanie
2
Philadelphie
2
2009-2017
1
Baltimore
1
Baltimore (Md.)
1
Caroline du Nord
1
Flight 93 National Memorial
1
Flight 93 National Memorial (Pa.)
1
Kolonie Carolina
1
Maryland
1
Mississippi
1
North Carolina
1
Rhode Island
1
Shanksville
1
Shanksville (Pa.)
1