Seventy million people can't get from here to there. They need a wheelchair but can't afford one. They crawl on the ground or wait for someone to carry them. Along comes a man named Don Schoendorfer, an MIT-trained bio-mechanical engineer. He sees this and invents a low-cost, durable wheelchair. This is just the beginning of a story that began many years ago in Ayacucho, Peru. In 2016, Schoendorfer returns there to make one of the most important deliveries of his life.—Jody Santos