No survivors are expected after a plane collided with a military helicopter in Washington, D.C. on Wednesday. A local man ...

Footage from an EarthCam live camera shows the moment a regional jet collided in midair with a Black Hawk helicopter while on approach to land at Reagan Washington National Airport.

A thousand feet beneath the desert, the United States conducts experiments to verify that its weapons work. But some fear a ...

A historic nuclear reactor in Washington State was a critical part of the Manhattan Project, a site where plutonium was ...