The Challenges of Urban Drone Delivery

Zipline co-founder Keenan Waiobek talks about what is holding up widespread Urban Drone Delivery. Can you deliver precisely enough that a picture you're on a row house in Boston, can you actually hit that back porch? Not easy. And then are you quiet enough that this is actually acceptable? This can't sound like a swarm of bees. Do you think it's difficult enough to operate drone delivery that porch pirates would not be able to create their own drones with grappling hooks to come and try to steal your package? I think we extraordinarily challenging.