What Do Shake Shack and Delta Air Lines Have in Common?
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What Do Shake Shack and Delta Air Lines Have in Common?

This Sunday is National Cheeseburger Day. What exactly does this have to do with one of the major U.S. airlines though? Today, Delta announced it will be serving Shake Shack burgers to its Delta One business class customers flying from JFK to LAX on Sunday in honor of National Cheeseburger Day. In addition, all flyers…