PMAir traffic controller working at time of crash interviewed by NTSB investigatorsThe DCA air traffic controller who was working at the time of the collision has been interviewed, NTSB member Todd Inman said during the briefing.

Sixty-seven people are believed to have died after a passenger plane hit a military helicopter in mid-air near Washington DC's Ronald Reagan airport on Wednesday evening.

A deadly midair collision between an American Airlines jet and an Army helicopter near the nation's capital is bringing renewed focus on the federal agency charged with investigating aviation disasters.