An engine on the train braked moments before it left the tracks. At least seven people died. Robert Sumwalt is from the NTSB.

火车上一个引擎在火车脱轨前一刻刹车。事故造成至少7人死亡。Robert Sumwalt在美国国家交通安全委员会报道。

The officials also said the engineer used full emergency brakes moments before the train went off the tracks.

官员们还说， 工程师在火车脱轨前使用了紧急刹车。