The collision over the Potomac River occurred at 8:47 p.m. Eastern time ... Photos from the scene show the Army helicopter upside-down in the water and the airplane in pieces.

This project, the second for the Potomac River, builds on the first, which covered the area from Shepherdstown, West Virginia, to the Little Falls dam near Washington, DC. The generated maps are ...

Explore the nation’s history through an aerial trip along the Potomac River. Beginning in West Virginia, the fly over event captures the flow of the Potomac River as it rapidly descends through ...