Tamanend bottlenose dolphins are seasonal visitors to the Chesapeake Bay and Potomac River. They are a coastal population of ...

It will continue to get harder to ensure there’s enough drinking water from the Potomac River, according to a group that coordinates with D.C.-area water companies.

The George Washington Parkway is undertaking a new initiative to upgrade and replace several of its drinking fountains, ...

At their closest points, helicopters and planes routinely flew within 75 feet near the airport, according to the NTSB.

As hearings unfold into the fatal January plane-helicopter collision near D.C., investigators say the FAA ignored clear ...

A long list of things went wrong in January and contributed to the collision between an Army helicopter and an American ...

The army helicopter that crashed into a passenger jet over Washington DC was flying too high, investigators have concluded.

Photo / Petty Officer 1st Class Brandon Giles, US Coast Guard via ) Investigators painted a devastating picture today of ...

It is the second of three days of witness testimony and public inquiry by the National Transportation Safety Board into ...

The NTSB concluded three days of investigative hearings into the collision between an Army helicopter and a passenger plane ...

Investigators examining January's fatal midair collision near Washington have questioned the Black Hawk's altitude data, ...