An enormous blast that killed 30 workers at a pipeline facility in northern Mexico was a big setback for the state-owned oil company, which up to this year had been reporting strides in its safety record at once accident-prone plants.
An enormous blast that killed 30 workers at a pipeline facility in northern Mexico was a big setback for the state-owned oil company, which up to this year had been reporting strides in its safety record at once accident-prone plants.
