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Marker coil at National Airport station
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Escalators at Parliament station
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Eastbound platform at Parliament station
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Blue Ridge Tunnel [16]
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Blue Ridge Tunnel [15]
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Blue Ridge Tunnel [14]
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Blue Ridge Tunnel [13]
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Blue Ridge Tunnel [12]
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Blue Ridge Tunnel [11]
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Blue Ridge Tunnel [10]
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Blue Ridge Tunnel [09]
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Blue Ridge Tunnel [08]
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Blue Ridge Tunnel [07]
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Blue Ridge Tunnel [06]
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Blue Ridge Tunnel [05]
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Blue Ridge Tunnel [04]
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Blue Ridge Tunnel [03]
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Blue Ridge Tunnel [02]
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Blue Ridge Tunnel [01]
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Unsafe sign on an escalator
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Glenmont station, viewed from escalators
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Green Line train at Fort Totten [03]
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Green Line train at Fort Totten [02]
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Green Line train at Fort Totten [01]
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Vintage railroad crossbuck [08]
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Vintage railroad crossbuck [07]
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Maryland Midland Railway track
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Vintage railroad crossbuck [06]
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Vintage railroad crossbuck [05]
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Vintage railroad crossbuck [04]
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Vintage railroad crossbuck [03]
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Vintage railroad crossbuck [02]
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Vintage railroad crossbuck [01]
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7000-Series train at Fort Totten