Elon Musk has become a key figure in President Donald Trump's administration, heading up the Department of Government ...

The Black Haw's Automatic Dependent Surveillance-Broadcast - which allowed it to broadcast its location and other information ...

The Army Black Hawk helicopter involved in the fatal midair collision in Washington, D.C., had a tracking system turned off, ...

Through maps, videos, photos and radio transmissions, CNN is piecing together what occurred during the deadly, midair collision.