Why is the boundary between Virginia and Maryland on the Potomac River so odd? It is not in the middle of the river, like ...

This $615 million project is key to cleaning up the Potomac River. When heavy rain strikes a centuries-old neighborhood in Alexandria, Va., the city’s pipes can’t handle the volume.

U.S. Coast Guard Petty Officer 3rd Class Corbin Singleton, left, and Petty Officer 2nd Class Lance Ide, boatswain’s mates at Station St. Inigoes, respond to the aircraft collision on the Potomac River ...

Potomac by Air: Our Nation's River is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet ...

A large urban park extending from the Washington, D.C.-Maryland border to the Potomac River, Rock Creek Park is a destination for an expansive array of outdoor activities. It has more than 32 ...