Shifting Gears: Meet Amazon's most important man who's not Jeff Bezos (AMZN, TSLA, UBER, UAL, AAL)

Happy Friday and welcome to another issue of Shifting Gears, Business Insider's roundup of all things transportation from the week.

Have you ever heard of Dave Clark? I hadn't until a few months ago. The 21-year Amazon veteran started as a warehouse manager and worked his way up to a top lieutenant of CEO Jeff Bezos.

Now,...