This $615 million project is key to cleaning up the Potomac River ... treated before draining into the river. More than 800 other cities across the United States have similar sewer systems ...
The National Transportation Safety Board released its preliminary report on the Jan. 29 midair collision near Reagan National ...
A timeline of the Washington, D.C., plane crash on Jan. 29 details the moments before and after an American Airlines passenger flight and Army helicopter collided over the Potomac.