Dorothy, 77, showed him in. In the middle of the living room, Dave saw her son Steve, 50, propped up in a hospital bed. His right leg had been amputated below the knee because of diabetes. In the nearby bedroom was her husband, John, 78, who has Parkinson's disease. Recalling the moment, Dave told me that he "immediately felt and saw the life stripped out of Dorothy" because of the pressures she faced. He proceeded with his inspection of the Cothrans' bathroom. He saw an old tub unsuitable for a person with Steve's disability. He saw fixtures that made the...