FedEx meteorologist Erik Proseus at the company's hub at the Memphis airport.
FedEx meteorologist Erik Proseus at the company's hub at the Memphis airport. - 
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FedEx has a giant hub in Memphis where it ships out a million packages a night this time of year, an operation that makes Memphis the busiest airport in the world after dark. It's just a slice of a global and logistically mind-boggling system, whose smooth running is arguably dependent on 15 people — the meteorologists. Kory Gempler and Erik Proseus tell us what the job is like.