The e-cigarette maker Juul has seen stratospheric sales since early 2017, making it one of the buzziest startups in Silicon Valley. But now a backlash over the company's popularity with teenagers could jeopardize that. This week on Decrypted, Olivia Zaleski and Pia Gadkari trace the company's story from its origins. Juul says it only ever wanted to help adults quit smoking. Instead, it's become a social media sensation. And critics fear teen vaping is nothing short of a new public health crisis in the making.