An American Airlines regional jet went down in the Potomac River near Washington, D.C.'s Ronald Reagan Washington National ...

A airplane and military helicopter collided in Washington, D.C., before plunging into the Potomac River. Here's who was on ...

You can find maps of the entire lower Potomac, which includes the flow from Opequon Creek into Washington, D.C., at the Interstate Commission of the Potomac River Basin's website potomacriver.org.

The advisories impact large areas of Idaho, Oregon, Montana and Washington, lasting through the end of January.

The two aircraft plunged into the dark, frigid Potomac River. No one survived ... flew past the Lincoln Memorial and over the Tidal Basin. As the inky black Potomac spread out below the helicopter ...