One dog with the Metropolitan Washington Airports Authority Police Department and two dogs with the Metropolitan Police ...

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.

Two machines met over the Potomac that night, and in the space of three heartbeats, dozens of human lives came apart in a way no amount of training or luck could put back together.