Congress is holding a hearing Thursday about the January collision between an American Airlines passenger jet and an Army helicopter that killed all 67 people aboard both aircraft.

A congressional hearing Thursday reinforced the idea that the January midair collision between an American Airlines passenger jet and an Army helicopter that killed all 67 people aboard both aircraft could have been prevented.

The head of the National Transportation Safety Board that is investigating the crash is appearing along with the leaders of the Federal Aviation Administration and the Army’s aviation