Cancer is on the rise in Africa, with the World Health Organization predicting that by 2020, it will take the lives of one million people a year across the continent. The most common forms of the disease in Africa -- breast, cervical and prostate cancers -- are also the most treatable, but drugs have been in scarce supply, and the price of treatment remains a huge obstacle. While cancer has not yet received the attention accorded to infectious disease, the first-ever cancer center has opened in Rwanda, the American Cancer Society is forging partnerships across Africa, and some pharmaceutical companies have begun to steeply discount their therapies. A commitment to saving lives is growing.