a story about efforts to eradicate blindness worldwide, Nat Geo hadn’t mentioned preventable blindness due to infections spread by flies and parasites, the 39th president noted—and his nongovernmental organization, the Carter Center, had administered nearly 60 million treatments to prevent such infections just that year. )The assignment came with plenty of peril: After mapping out their moves on a dummy of the plant built on a nearby tennis court, Carter and his colleagues would be lowered into the reactor for a short period of time each. Since there is no way to cure or vaccinate against the disease, the Carter Center worked to train over 100,000 village-based health care workers who treat Guinea worm disease and other illnesses