Questions and answers about the NTSB’s role in investigating the PG&E gas explosion and fire in San Bruno:
Why is the National Transportation Safety Board investigating?
Pipelines are considered modes of transportation because a product (natural gas) travels through them. Therefore, the NTSB investigates pipeline accidents that involve a fatality.
Will the NTSB hold the wrongdoer accountable?
No. 
ever been used. That’s because tires older than six years are prone to "detreading." Detreading
cover minor injuries only. If any hospital stay is involved, the minimum coverage is unlikely to be