At 73, Jeana Moore is spending 45 days walking more than 350 miles for a cause that became deeply personal nearly two decades ago. In 2009, she founded the Jada Bascom Foundation after her granddaughter, Jada, was diagnosed with acute myeloid leukemia at just one month old. Today, Jada is 19 and healthy, thanks in part to a stranger in Germany who had joined a donor registry and turned out to be her perfect match. Now, Jeana is walking again—not…