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Subject
- Pan American World Airways, inc.[remove]80
- Air travel59
- Clouds27
- Land25
- Mountains25
- Hills20
- Valleys18
- Rivers17
- Croplands15
- Snow13
- Buildings9
- Coastlines9
- Shadows8
- Trees8
- Houses6
- Lakes & ponds6
- Polar Jet6
- Bodies of water5
- Rocky Mountains5
- Airplane wings4