Emily Bancroft, Delivering Life-Saving Vaccines With Drones

Dave talks with Emily Bancroft, CEO of the Seattle-based nonprofit VillageReach. Her organization has started using drones to deliver vaccines, medicine and lab results to rural clinics in the Democratic Republic of Congo.  But the technology, while efficient and effective, is costly - and how do residents know that the drones are bringing life-saving drugs rather than being used as weapons of war?