The NTSB concluded three days of investigative hearings into the collision between an Army helicopter and a passenger plane that killed 67.

A three-day hearing into the January mid-air collision between an Army Blackhawk helicopter and an American Airlines jet concluded today. The National Transportation Safety Board's hearing focused on the breakdown of safety systems that led to the deaths of 67 people,

The National Transportation Safety Board will hold three days of hearings on the January midair collision that killed 67 people.