29-year-old physician assistant at St. Jude Children’s Research Hospital® who was treated as a child for bone cancer at St. Jude. She’ll also be the first to launch with a prosthesis. When she was 10, she had surgery at St. Jude to replace her knee and get a titanium rod in her left thigh bone. She still limps and suffers occasional leg pain, but has been cleared for flight by SpaceX. She’ll serve as the crew’s medical officer.