Animated video shows timeline of American Airlines flight collision with US Army helicopter ...

A pair of quasars that existed when the universe was only 3 billion years old has been spotted by the Hubble Space Telescope.

The collision occurred in airspace that is difficult to navigate. Flight data, video and air traffic control audio show how the tragedy unfolded.

Planes are once again taking off and landing at Reagan Washington Airport as things get back to normal amid an ...