The company known mostly for its short-term rentals wants an even bigger share of the roughly $180 billion tours and activities industry. Airbnb just hired a former top Disney executive to run its Experiences business, all while it’s gearing up for an IPO expected later this year and grappling with concerns about safety and fraud. Marketplace’s Amy Scott spoke with Aric Jenkins, a staff writer at Fortune, about Airbnb’s challenges ahead of its potential IPO.