Trust is the foundation for everything we do. But what do we do when it's broken? In an eye-opening talk, Harvard Business School professor Frances Frei gives a crash course in trust: how to build it, maintain it and rebuild it -- something she worked on during a recent stint at Uber. "If we can learn to trust one another more, we can have unprecedented human progress," Frei says.

Here’s a traffic jam you can actually solve. Rush Hour challenges you to pause, plan and spot patterns others might miss. Every car blocks another, and every move opens a new path. Hit the brakes on scrolling, and fuel your mind.