Cicada season: What to expect from the coming brood that's been underground for 17 years

The bugs are coming - billions of them. The periodical cicada emergence is just days away in many states. While their emergence occurs every 17 years and is no reason for fear, experts worry climate change is spurring them to mature faster. John Yang lays out what that means, and what you need to know to cope with the loud brood that's coming.
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