‘Selling a promise’

What Silicon Valley learned from the fall of Theranos. The company was founded in 2003 and "promised to upend the vast medical testing industry with a technology that could perform a range of health tests on just a small drop of blood." By 2013, Theranos was worth $10 billion, and its CEO, Elizabeth Holmes, was being ranked among the likes of Steve Jobs. Then, a few years later, it all came crashing down. Will this be a true reckoning for Silicon Valley? Kari Paul explores.