The head of the National Transportation Safety Board sharply criticized U.S. officials for failing to act before the January 29 collision of a U.S. Army helicopter with an American Airlines regional jet in Washington that killed 67 people.

The U.S. Army helicopter involved in the midair collision over Ronald Reagan National Airport in January was flying higher than it was supposed to be when it crashed into an American Airlines flight that was about to land at the airport,

Investigators have found that a helicopter involved in a deadly crash with a passenger plane over Washington was flying above its height limit.