Two racing legends celebrate birthdays

Mario Andretti still enjoying life in the fast lane at 72

American's best ever race driver, Mario Andretti, winner of 4 IndyCar titles, the '69 Indy 500, the '67 Daytona 500 and the '78 F1 world championship, turned 72 years old on Tuesday and current IndyCar driver Sebastien Bourdais also celebrated a birthday on Tuesday. Another IndyCar and Indy 500 champion, Bobby Unser turned 78 last week.

Happy Birthday to all.