D.C., prompting a large search-and-rescue operation in the nearby Potomac River.

Live view of the Potomac River after a midair collision between an Army helicopter and an American Airlines flight from Kansas killed all 67 people aboard the two aircraft, officials said Thursday. At ...

An aerial view of the Potomac River that runs near Leesburg, Virginia and separates the state from Maryland. Google’s data center in Leesburg, Virginia, consumed 173.2 million gallons of water ...

Live from Ronald Reagan National Airport overlooking the Potomac River to retrieve the submerged wreckage of an airliner and an Army helicopter that collided midair in the deadliest U.S. air disaster ...