The aircraft used by NOAA to conduct LiDAR scanning of the Potomac River early Friday. Photograph courtesy of ... helped crews identify spots where New Orleans’ levy system failed to prevent mass ...

There was no immediate confirmation of any casualties, but surviving an extended submersion in the river would be difficult. On Wednesday, the Potomac River was 36 degrees Fahrenheit, according to ...

(CNN) — A commercial passenger plane bound for Ronald Reagan National Airport collided with a US Army Black Hawk helicopter over the Potomac River just outside of Washington, DC, on Wednesday night.