Hurricane Sandy dealt a $50 million blow to Delta Air Lines' operations, but the storm also threw a wrench in Delta’s quest to begin jet fuel production at its new refinery. The carrier’s Trainer refinery, located south of Philadelphia, was expected to open in the fourth quarter, but the impact of the storm has pushed back the start date. While it has been producing jet fuel since late September, the full restart of the refinery, which has been shuttered for a year, is still a few...