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The National Transportation Safety Board met Tuesday to release the findings of their year-long investigation into the Merrimack Valley gas explosions, and recommend stronger gas regulations. WBZ NewsRadio's Karyn Regal reports.
The National Transportation Safety Board met Tuesday to release the findings of their year-long investigation into the Merrimack Valley gas explosions, and recommend stronger gas regulations. WBZ NewsRadio's Karyn Regal reports. read more read less

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