 Complete the following phrase:  Hamiltons final season of races would be 2011. He finished 24th in the 2011 Indianapolis 500. He also raced in the Twin 275s at Texas for unfinished business. His final start would be at the tragic 2011 IZOD IndyCar World Championship at Las Vegas. Hamilton was fortunate enough to escape the major accident on lap 11 that killed Dan Wheldon, but the race was abandoned, and the results were scratched from official record. When the new chassis and engine package was introduced for the 2012 season, Hamilton was unable to secure a car for the 