Across town at Uber’s headquarters, he had heard about Zimride’s plans, and he had heard whispers about Sunil Paul’s escapades, too. Kalanick considered Mark Zuckerberg a friend—or at least a familiar acquaintance—and the Facebook CEO had given Kalanick a heads up. Facebook employees were going crazy for Sidecar, Zuckerberg told him. Zuckerberg warned Kalanick that he might want to keep an eye on the company.
