As Amazon, Google and others ramp up their drone-delivery tests, one question looms large: How will their home base function? For hints, the tech titans may well look to Rwanda, where workers will soon break ground on three “drone ports,” designed to make it easier to transport food, medical supplies, electronics, spare parts and other goods through the hilly countryside, where road travel is difficult. The Rwanda project “is a relatively modest beginning,” says Norman Foster, chairman of architecture firm Foster + Partners, which is leading the first phase of construction (scheduled to be completed in 2020). But, he adds, “it could be a catalyst,” helping to solve an array of pressing health issues and creating a model for other countries looking to regulate commercial drone use.