When Andra Rush started her trucking company, all she had was an old van£¬two used pick-up trucks and the simple certainty of a 23-year-old girl. But she planned to make her fortune in about four years to   36  her true goal: dealing with poverty on Native American reservations across North America. "I thought I could retire by the time I was 27," says Rush, "At that age, you don't know 37  you don't know."