An investigation from the National Transportation Safety Board (NTSB) has found the pilot of a military chopper that collided with a passenger plane may have had disrupted radio transmissions

The Black Hawk pilots who collided with an American Airlines plane last month may not have heard vital information given by air traffic control to fly behind the passenger jet seconds before the

The National Transportation Safety Board says altimeter in the Black Hawk helicopter may have malfunctioned before the DCA mid-air collision with an American Airlines jet. All 67 people aboard died.