美国国家运输安全委员会就1月29日发生的陆军直升机与美国航空支线客机相撞事故展开为期三天的听证会。

Group 1 - The National Transportation Safety Board (NTSB) is conducting a three-day hearing regarding the collision incident between an Army helicopter and an American Airlines regional passenger plane that occurred on January 29 [1]