When a near-fatal brain hemorrhage prompted Dawn Zuidgeest-Craft and her husband to revisit their bucket list, she spoke aloud the dream she'd been postponing for decades: medical school. Through two marriages, four children, and a fulfilling career as a nurse practitioner, the aspiration had quietly persisted, waiting for its moment. At 72, she became the oldest graduate of St. James School of Medicine, funding her education with retirement savings and pushing through failed exams with support from classmates young enough to be her grandchildren. "I feel alive when I work in the medical field," she says, and at 73, she begins her residency -- proof that some callings don't fade with time, they simply wait for us to stop waiting.