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Millions of packages flow through Amazon's ever-expanding network of fulfillment centers daily, and more and more are leveraging automation technology.

One of those sites in Kent, Washington, is capable of handling 1 million parcels daily alone, leveraging employee know-how, robotics, technology-enhanced workstations, inventory "pods" and automated packaging machines to keep packages moving.

I got to put on a pair of steel-toed shoe covers and take a peek behind the curtain to see how it all comes together. Here’s what I saw:

Welcome to the warehouse