In 2009 Rita van Loenen was undergoing dialysis in Phoenix, AZ, three times a week for her kidney ailment. One day, she told the cabbie who drove her to the appointment that she would die unless she received a kidney. The driver, Thomas Chappell,  offered to give her one of his.

Rita Van Loenen, of Gilbert, Ariz., left, and Thomas Chappell, of Phoenix.Continue Reading