Watch: Route 66 - McLaren returns to the Brickyard

McLaren Racing returns to Indianapolis as a sole entrant for the first time since 1979 and Fernando Alonso also returns to the Brickyard for the second time as he looks to try and complete motorsports 'triple crown'. Here Alonso and former winners of the prestigious race in the form of Gil De Ferran and Johnny Rutherford discuss the challenges ahead of the 103rd running of the Indianapolis 500.