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    NTSB investigates California train derailment

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NTSB investigates California train derailment

The National Transportation Safety Board is investigating a commuter train derailment that happened in Oxnard, California. CNN's Rene Marsh has more.

NTSB investigates California train derailment

The National Transportation Safety Board is investigating a commuter train derailment that happened in Oxnard, California. CNN's Rene Marsh has more.