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Headwaters of the Susquehanna River just south of Cooperstown, New York

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The Potomac River south of Washington, D.C., near Quantico, Virginia, flowing toward the confluence with the bay

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The South Fork of the South Branch of the Potomac River in Pendleton, West Virginia

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Harpers Ferry, West Virginia, and the confluence of the Shenandoah and Potomac rivers

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Horseshoe Bend of the Potomac River in West Virginia

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Sailboat tracking northward near Sandy Point, Maryland, with the Chesapeake Bay Bridge in the background

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The White House and Washington, D.C., with the Potomac River and Tidal Basin in the background. Washington, D.C., is now a flight-restricted area, and it is very difficult to gain permission to overfly the city.

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Red Tide on the Rappahannock River of Virginia near Tappahannock

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Wicomico River of Virginia in the Northern Neck

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Blackwater Refuge on Maryland’s Eastern Shore

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Smith Island, Maryland. The village of Ewell is in the foreground with Rhodes Point in the distance.

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Conowingo Dam on the Susquehanna River helps hold back pollutants from upstream Susquehanna sources.

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Islands near Sunbury, Pennsylvania, in the middle reach of the Susquehanna River

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Fisherman Island at the southern tip of the Delmarva Peninsula after a rare snowfall

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Poplar Island is being rebuilt with the dredge spoils from Baltimore's Inner Harbor. The island is being restored to its original shape and will see mixed use as a nature preserve and for recreation.