A new study in Chile shows how small differences in rock type can drive large differences in erosion, vegetation, and river networks, illuminating the role of mineralogy in shaping landscapes.

Investigators have recovered most of the airplane and helicopter from the Potomac River, but continued searching for objects on the river floor.

The pieces of wreckage recovered Tuesday were lifted by a crane and placed onto a barge with other parts recovered from the ...

It has been nearly a week since a commercial jetliner and an Army helicopter collided in midair near Washington’s Ronald ...

Authorities confirmed that only one air traffic controller was on duty that night, handling the responsibilities typically managed by two.

The Army Black Hawk helicopter that collided with an American Airlines passenger plane was flying too high, according to the ...

Crews have recovered the victims and several more pieces of a regional passenger jet that plunged into the Potomac River last week after colliding with a Black Hawk military helicopter near Reagan ...

Salvage crews have removed a large portion of a commercial jet from the Potomac River near Washington’s Reagan National ...

The Army on Friday released the names of the two other soldiers on the helicopter, Staff Sgt. Ryan Austin O’Hara, 28, of ...

The Army Corps of Engineers recovered part of the plane wreckage from the Potomac River on Monday (February 3), after last ...

Divers and salvage workers are adhering to strict protocols and will stop moving debris if a body is found, to preserve the ...

Recovery crews have been hard at work doing rehearsals to prepare for Monday morning, when they will lift the wreckage of the plane out of the Potomac River.