NEW YORK -- Amazon may experience some holiday turbulence in its shipping.
A pilot's union says poor working conditions may cause packages to arrive late.
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Millions of Amazon customers who rely on the company's two-day Prime delivery are getting a startling warning about the looming holiday problem.
Pilots for the online shopping giant's Prime Air service used its review format to give a one-star rating to their pilot's union contract and said "there may not be enough pilots to deliver for Amazon around the holidays".
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But according to the retail giant, there will be no disruptions during the busy holiday season.