Sediment, debris, bacteria and chemicals can wash off a construction site and pollute streams and lakes nearby.

By Alaa Elassar, Samantha Waldenberg, Taylor Galgano, David Williams, Amanda Jackson, Jessica Coacci and Haley Britzky, CNN ...

A U.S. Army captain who died in Wednesday’s midair collision of a Black Hawk helicopter and an American Airlines jet was ...

All 67 people on board the American Airlines regional jet and US Army Black Hawk helicopter that collided midair Wednesday ...

Leaders of dozens of Head Start preschools said they might need to close temporarily because they remain locked out of their ...

There were 64 passengers aboard the plane, and three Army soldiers in the helicopter, according to officials. Here's a look ...

There were 64 passengers aboard the plane, and three Army soldiers in the helicopter, according to officials. Here's a look ...

The Army withheld the name of Capt. Rebecca Lobach, the US Army pilot killed in a disastrous crash on Wednesday, for an extra ...

The U.S. Army released the name of one of the Black Hawk soldiers killed in the crash over D.C.'s Ronald Reagan Washington ...

Rebecca Lobach last Wednesday evening ... sometimes offering unprompted to buy them a copy. She had a vocabulary full of "$10 words," said Lt. Samantha Brown, a close friend who near Lobach ...

Friends of Army Capt. Rebecca Lobach described her as a dedicated friend and mentor whose life was full of promise and cut ...

Air traffic controller audio TIME retrieved from LiveATC.net revealed what happened moments before the collision. The tower ...