The Army has made changes to how its helicopters use a safety system that broadcasts aircraft location and has reduced the number of flights over Washington following a collision with a passenger jet ...

The cleanup event aims to improve water quality and protect wildlife habitats in the Potomac River, which supplies drinking water to over five million people. Despite recent improvements ...

The wreckage of a U.S. Army Black Hawk helicopter in the Potomac River in Washington, D.C., Thursday. (BRANDON GILES/U.S. COAST GUARD) The U.S. Coast Guard released images taken Thursday of the ...