NTSB photos: Amtrak #188 derailment site in Philadelphia

Member Robert Sumwalt on the scene of the Amtrak Train #188 Derailment in Philadelphia. Photo: NTSB

NTSB IIC Mike Flanigon briefs Vice Chairman Dinh-Zarr on the scene of the Amtrak Train #188 Derailment in Philadelphia. Photo: NTSB

NTSB IIC Mike Flanigon briefs Philadelphia Mayor Michael Nutter on the scene of the Amtrak Train #188 Derailment in Philadelphia. Photo: NTSB

Member Sumwalt briefs the media on Amtrak Train #188 Derailment in Philadelphia. Photo: NTSB

Member Robert Sumwalt on the scene of the Amtrak Train #188 Derailment in Philadelphia. Photo: NTSB

The NTSB Go Team arrives on the scene of the Amtrak Train #188 Derailment in Philadelphia. Photo: NTSB

NTSB IIC Mike Flanigon and members of the investigative team on the scene of the Amtrak Train #188 Derailment in Philadelphia. Photo: NTSB

NTSB IIC Mike Flanigon with Member Sumwalt and Vice Chairman Dinh-Zarr on the scene of the Amtrak Train #188 Derailment in Philadelphia. Photo: NTSB

NTSB Recorder Specialist Cassandra Johnson works with officials on the scene of the Amtrak Train #188 Derailment in Philadelphia. Photo: NTSB

Member Sumwalt with Philadelphia officials The NTSB Go Team arrives on the scene of the Amtrak Train #188 Derailment in Philadelphia. Photo: NTSB

Member Sumwalt briefs the media on Amtrak Train #188 Derailment in Philadelphia. Photo: NTSB

