The National Transportation Safety Board on Friday enters its third and final day of public testimony over the fatal midair crash between an Army helicopter and commercial jet in January. Two previous days of testimony underscored a number of factors that likely contributed to the collision that left all 67 people aboard both aircrafts dead,

Military helicopter traffic over Washington was a longtime worry among aviators operating around the airport where an Army helicopter and commercial airliner collided this year, killing 67 people, federal investigators heard during testimony on Thursday.

Investigators probing the January midair collision of a passenger plane and an Army helicopter over Washington that killed 67 people found the chopper was flying higher than it should have been and its altitude readings were inaccurate.