As investigators combed through the wreckage of the Amtrak train, officials vowed to restore confidence in rail safety.
원문출처 : http://www.cnn.com/2017/12/20/us/amtrak-derailment-washington/index.html
원문출처 : http://www.cnn.com/2017/12/20/us/amtrak-derailment-washington/index.html