Ronnie Walker and her mother Kimberly Covington have been virtually homeless for months. They're moving from place to place -- a lifestyle that's even more taxing given Ronnie's condition. She's 14 and has a rare pulmonary disease. She desperately needs a lung transplant, or she'll probably die. Right now, she can't get on the organ transplant list, as it's critical that she has a stable home after the surgery to recover.